Bug 703661 - Add back WAKE_LOCK permission request for PowerManager [r=blassey]

mobile/android/base/AndroidManifest.xml.in

@@ -18,6 +18,7 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT"/>
 
+    <uses-permission android:name="android.permission.WAKE_LOCK"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
 
     <uses-permission android:name="com.android.browser.permission.READ_HISTORY_BOOKMARKS"/>