Various improvements to the Chromoting Android app

remoting/android/java/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
         package="org.chromium.chromoting"
-        android:versionCode="1"
-        android:versionName="0.01">
+        android:versionCode="2"
+        android:versionName="0.02">
     <uses-sdk android:minSdkVersion="14"
             android:targetSdkVersion="14"/>
     <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.USE_CREDENTIALS"/>
     <application android:label="@string/app_name"
             android:icon="@drawable/chromoting128">
         <activity android:name="Chromoting"
                 android:configChanges="orientation|screenSize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
         <activity android:name="Desktop"
-                android:configChanges="orientation|screenSize"/>
+                android:configChanges="orientation|screenSize"
+                android:theme="@android:style/Theme.DeviceDefault.NoActionBar.Fullscreen"/>
     </application>
 </manifest>