feat(permissions): add SMS permission screen and settings button; route from splash on Android

android/app/src/main/AndroidManifest.xml

@@ -33,6 +33,10 @@
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
+        <!-- Google AdMob App ID -->
+        <meta-data
+            android:name="com.google.android.gms.ads.APPLICATION_ID"
+            android:value="ca-app-pub-6691216385521068~6638409932" />
     </application>
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility and