Create network change notifier.

talk/app/webrtc/androidtests/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="org.webrtc.test"
     android:versionCode="1"
     android:versionName="1.0" >
     <uses-feature android:name="android.hardware.camera" />
     <uses-feature android:name="android.hardware.camera.autofocus" />
     <uses-feature android:glEsVersion="0x00020000" android:required="true" />
 
     <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
 
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
     <instrumentation
         android:name="android.test.InstrumentationTestRunner"
         android:targetPackage="org.webrtc.test" />
 
     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name" >
         <uses-library android:name="android.test.runner" />
     </application>
 
 </manifest>