[Android] Oops. Keep the screenOrientation setting to landscape.

Source/Android/AndroidManifest.xml

@@ -18,6 +18,7 @@
             android:name=".DolphinEmulator"
             android:label="@string/app_name"
             android:theme="@android:style/Theme.NoTitleBar.Fullscreen"
+            android:screenOrientation="landscape"
             android:configChanges="locale|keyboard|keyboardHidden|navigation|fontScale|uiMode" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />