Re-organize gradle modules.

demo/registration/src/main/AndroidManifest.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <uses-permission android:name="android.permission.INTERNET" />
+
+  <application
+    android:name=".RegistrationApplication"
+    android:allowBackup="true"
+    android:icon="@mipmap/ic_launcher"
+    android:label="Registration Sample"
+    android:theme="@android:style/Theme.Material.NoActionBar"
+    android:supportsRtl="true">
+
+    <!-- Disable Firebase Analytics -->
+    <meta-data android:name="firebase_analytics_collection_deactivated" android:value="true" />
+    <meta-data android:name="firebase_messaging_auto_init_enabled" android:value="false" />
+
+    <activity
+      android:name=".MainActivity"
+      android:exported="true">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+
+    <!-- FCM Service for receiving push challenges -->
+    <service
+      android:name=".fcm.FcmReceiveService"
+      android:exported="false">
+      <intent-filter>
+        <action android:name="com.google.firebase.MESSAGING_EVENT" />
+      </intent-filter>
+    </service>
+  </application>
+
+</manifest>