change to standar check options

Author: vallemar

src/bottomsheet/bottomsheet.android.ts

@@ -51,7 +51,7 @@ export class ViewWithBottomSheet extends ViewWithBottomSheetBase {
                     },
 
                     onBackPressed(dialog: com.nativescript.material.bottomsheet.BottomSheetDialog) {
-                        if(options.dismissOnBackButton === false){
+                        if(bottomSheetOptions.options && bottomSheetOptions.options.dismissOnBackButton === false){
                             return true;
                         }