(Example App): Update AndroidManifest.xml

This enabled file upload support.

Author: vickz84259

example/push_notifications/android/app/src/main/AndroidManifest.xml

@@ -39,5 +39,14 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+        <provider
+            android:name="com.pichillilorenzo.flutter_inappwebview.InAppWebViewFileProvider"
+            android:authorities="${applicationId}.flutter_inappwebview.fileprovider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/provider_paths" />
+        </provider>
     </application>
 </manifest>