Fix SecurityException in UsersAndGroupsSearchProvider

[ZetaTom]

This change fixes an issue where java.lang.SecurityException would be displayed when searching for sharees. Because of a hard-coded string this only affected non-vanilla builds.

Stacktrace of exception

SuggestionsAdapter      com.nextcloud.android.qa             W  Search suggestions cursor threw exception. 
                                                                java.lang.SecurityException: Permission Denial: opening provider com.owncloud.android.providers.UsersAndGroupsSearchProvider from ProcessRecord{9b498c4 3310:com.nextcloud.android.qa/u0a144} (pid=3310, uid=10144) that is not exported from UID 10143 
                                                                        at android.os.Parcel.createExceptionOrNull(Parcel.java:3057)
                                                                        at android.os.Parcel.createException(Parcel.java:3041)
                                                                        at android.os.Parcel.readException(Parcel.java:3024)
                                                                        at android.os.Parcel.readException(Parcel.java:2966)
                                                                        at android.app.IActivityManager$Stub$Proxy.getContentProvider(IActivityManager.java:5906)
                                                                        at android.app.ActivityThread.acquireProvider(ActivityThread.java:7310)
                                                                        at android.app.ContextImpl$ApplicationContentResolver.acquireUnstableProvider(ContextImpl.java:3668)
                                                                        at android.content.ContentResolver.acquireUnstableProvider(ContentResolver.java:2542)
                                                                        at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:2027)
                                                                        at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1858)
                                                                        at android.content.ContentResolver.openInputStream(ContentResolver.java:1528)
                                                                        at androidx.appcompat.widget.SuggestionsAdapter.getDrawable(SuggestionsAdapter.java:559)
                                                                        at androidx.appcompat.widget.SuggestionsAdapter.getDrawableFromResourceValue(SuggestionsAdapter.java:532)
                                                                        at androidx.appcompat.widget.SuggestionsAdapter.getIcon1(SuggestionsAdapter.java:365)
                                                                        at androidx.appcompat.widget.SuggestionsAdapter.bindView(SuggestionsAdapter.java:309)
                                                                        at androidx.cursoradapter.widget.CursorAdapter.getView(CursorAdapter.java:274)
                                                                        at androidx.appcompat.widget.SuggestionsAdapter.getView(SuggestionsAdapter.java:449)
                                                                        at android.widget.AbsListView.obtainView(AbsListView.java:2466)
                                                                        at android.widget.DropDownListView.obtainView(DropDownListView.java:305)
                                                                        at android.widget.ListView.makeAndAddView(ListView.java:2065)
                                                                        at android.widget.ListView.fillDown(ListView.java:791)
                                                                        at android.widget.ListView.fillFromTop(ListView.java:853)
                                                                        at android.widget.ListView.layoutChildren(ListView.java:1836)
                                                                        at android.widget.AbsListView.onLayout(AbsListView.java:2263)
                                                                        at android.view.View.layout(View.java:24421)
                                                                        at android.view.ViewGroup.layout(ViewGroup.java:6440)
                                                                        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
                                                                        at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
                                                                        at android.view.View.layout(View.java:24421)
                                                                        at android.view.ViewGroup.layout(ViewGroup.java:6440)
                                                                        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)
                                                                        at android.widget.FrameLayout.onLayout(FrameLayout.java:270)
                                                                        at android.view.View.layout(View.java:24421)
                                                                        at android.view.ViewGroup.layout(ViewGroup.java:6440)
                                                                        at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:4258)
                                                                        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3583)
                                                                        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2465)
                                                                        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:9305)
                                                                        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1339)
                                                                        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1348)
                                                                        at android.view.Choreographer.doCallbacks(Choreographer.java:952)
                                                                        at android.view.Choreographer.doFrame(Choreographer.java:882)
                                                                        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1322)
                                                                        at android.os.Handler.handleCallback(Handler.java:958)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:99)
                                                                        at android.os.Looper.loopOnce(Looper.java:205)
                                                                        at android.os.Looper.loop(Looper.java:294)
                                                                        at android.app.ActivityThread.main(ActivityThread.java:8177)
                                                                        at java.lang.reflect.Method.invoke(Native Method)
                                                                        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)

Fixes #11712

---

• Tests written, or not not needed

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	69	69
Errors	3	3

SpotBugs

Category	Base	New
Bad practice	68	68
Correctness	71	71
Dodgy code	351	351
Experimental	2	2
Internationalization	7	7
Malicious code vulnerability	2	2
Multithreaded correctness	6	6
Performance	56	56
Security	19	19
Total	582	582

[github-actions]

APK file: https://www.kaminsky.me/nc-dev/android-artifacts/12616.apk



To test this change/fix you can simply download above APK file and install and test it in parallel to your existing Nextcloud app.

[ZetaTom]

/backport to stable-3.28

[github-actions]

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