minor Android tweaks

- removed ads reference no longer used in manifest
- removed redundant android:debuggable attribute
- cleared EGL debug warning log spamming issue #581

projects/mtg/Android/AndroidManifest.xml

@@ -4,15 +4,13 @@
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-    <application android:debuggable="false" android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
+    <application android:icon="@drawable/icon" android:label="@string/app_name" android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
         <activity android:configChanges="keyboard|keyboardHidden|orientation" android:label="@string/app_name" android:name="org.libsdl.app.SDLActivity" android:screenOrientation="sensorLandscape">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
-        
-        <activity android:configChanges="keyboard|keyboardHidden|orientation" android:name="com.google.ads.AdActivity" android:screenOrientation="sensorLandscape"/>
     </application>
     <uses-sdk android:minSdkVersion="10" android:targetSdkVersion="10"/>
 </manifest>

projects/mtg/Android/src/org/libsdl/app/SDLActivity.java

@@ -1207,7 +1207,7 @@ class SDLSurface extends SurfaceView implements SurfaceHolder.Callback, View.OnK
         {
             EGL10 egl = (EGL10) EGLContext.getEGL();
 
-            egl.eglWaitNative(EGL10.EGL_NATIVE_RENDERABLE, null);
+            egl.eglWaitNative(EGL10.EGL_CORE_NATIVE_ENGINE, null);
 
             // drawing here