Re-organize gradle modules.

demo/debuglogs-viewer/src/main/AndroidManifest.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest
+    xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <application
+      android:allowBackup="true"
+      android:label="@string/app_name"
+      android:supportsRtl="true">
+    <activity android:name=".MainActivity"
+        android:theme="@style/Theme.DebugLogs"
+        android:windowSoftInputMode="stateAlwaysHidden|adjustNothing"
+        android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"
+        android:exported="true">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+
+    <meta-data
+        android:name="com.google.android.gms.wallet.api.enabled"
+        android:value="true" />
+  </application>
+
+</manifest>