Fix Android updater compile issues

dewemoji-capacitor/android/app/src/main/java/com/dewemoji/app/MainActivity.java

@@ -62,7 +62,7 @@ public class MainActivity extends BridgeActivity {
     }
 
     @Override
-    protected void onDestroy() {
+    public void onDestroy() {
         super.onDestroy();
         if (downloadReceiver != null) {
             unregisterReceiver(downloadReceiver);
@@ -289,7 +289,7 @@ public class MainActivity extends BridgeActivity {
             if ("file".equals(downloadUri.getScheme())) {
                 installUri = FileProvider.getUriForFile(
                     this,
-                    BuildConfig.APPLICATION_ID + ".fileprovider",
+                    getPackageName() + ".fileprovider",
                     new java.io.File(downloadUri.getPath())
                 );
             }