base: fix pm cache directory invalidate on new builds

This was before in PackageManagerService.jave like
 final String cacheName = FORCE_PACKAGE_PARSED_CACHE_ENABLED ? "debug"
                : SystemProperties.digestOf(ro.build.date.utc);

Now they switched to PackagePartitions.FINGERPRINT which broke
the invalidate of the cache for new builds

also add a missed usage of changed fingerprint in StorageEventHelper.java

Change-Id: I6cca07659a8e7a4f99ed58761dc727e0e5e20ef8

services/core/java/com/android/server/pm/PackageManagerServiceUtils.java

@@ -1321,7 +1321,7 @@ public static void enforceSystemOrRoot(String message) {
         // identify cached items. In particular, changing the value of certain
         // feature flags should cause us to invalidate any caches.
         final String cacheName = FORCE_PACKAGE_PARSED_CACHE_ENABLED ? "debug"
-                : PackagePartitions.FINGERPRINT;
+                : SystemProperties.digestOf(String.valueOf(Build.TIME));
 
         // Reconcile cache directories, keeping only what we'd actually use.
         for (File cacheDir : FileUtils.listFilesOrEmpty(cacheBaseDir)) {
@@ -1350,16 +1350,15 @@ public static void enforceSystemOrRoot(String message) {
         // NOTE: When no BUILD_NUMBER is set by the build system, it defaults to a build
         // that starts with "eng." to signify that this is an engineering build and not
         // destined for release.
-        if (isUpgrade || incrementalVersion.startsWith("eng.")) {
-            Slog.w(TAG, "Wiping cache directory because the system partition changed.");
-
+        if (isUserDebugBuild && incrementalVersion.startsWith("eng.")) {
             // Heuristic: If the /system directory has been modified recently due to an "adb sync"
             // or a regular make, then blow away the cache. Note that mtimes are *NOT* reliable
             // in general and should not be used for production changes. In this specific case,
             // we know that they will work.
             File frameworkDir =
                     new File(Environment.getRootDirectory(), "framework");
             if (cacheDir.lastModified() < frameworkDir.lastModified()) {
+                Slog.w(TAG, "Wiping cache directory because the system partition changed.");
                 FileUtils.deleteContents(cacheBaseDir);
                 cacheDir = FileUtils.createDir(cacheBaseDir, cacheName);
             }

services/core/java/com/android/server/pm/StorageEventHelper.java

@@ -33,6 +33,7 @@
 import android.content.pm.PackagePartitions;
 import android.content.pm.UserInfo;
 import android.content.pm.VersionedPackage;
+import android.os.Build;
 import android.os.Environment;
 import android.os.FileUtils;
 import android.os.UserHandle;
@@ -166,7 +167,7 @@ private void loadPrivatePackagesInner(VolumeInfo vol) {
                     Slog.w(TAG, "Failed to scan " + ps.getPath() + ": " + e.getMessage());
                 }
 
-                if (!PackagePartitions.FINGERPRINT.equals(ver.fingerprint)) {
+                if (!String.valueOf(Build.TIME).equals(ver.fingerprint)) {
                     appDataHelper.clearAppDataLIF(
                             ps.getPkg(), UserHandle.USER_ALL, FLAG_STORAGE_DE | FLAG_STORAGE_CE
                             | FLAG_STORAGE_EXTERNAL | Installer.FLAG_CLEAR_CODE_CACHE_ONLY
@@ -204,10 +205,10 @@ private void loadPrivatePackagesInner(VolumeInfo vol) {
         }
 
         synchronized (mPm.mLock) {
-            final boolean isUpgrade = !PackagePartitions.FINGERPRINT.equals(ver.fingerprint);
+            final boolean isUpgrade = !String.valueOf(Build.TIME).equals(ver.fingerprint);
             if (isUpgrade) {
                 logCriticalInfo(Log.INFO, "Build fingerprint changed from " + ver.fingerprint
-                        + " to " + PackagePartitions.FINGERPRINT + "; regranting permissions for "
+                        + " to " + String.valueOf(Build.TIME) + "; regranting permissions for "
                         + volumeUuid);
             }
             mPm.mPermissionManager.onStorageVolumeMounted(volumeUuid, isUpgrade);