2D Recents: handle keyboard config changes.

                  android:resumeWhilePausing="true"

                  android:screenOrientation="behind"

                  android:resizeableActivity="true"

                  android:configChanges="orientation|screenSize|smallestScreenSize|screenLayout"

                  android:configChanges="orientation|screenSize|smallestScreenSize|screenLayout|keyboard|keyboardHidden"

                  android:theme="@style/RecentsTheme.Wallpaper">

            <intent-filter>

                <action android:name="com.android.systemui.recents.TOGGLE_RECENTS" />