Revert "MP1-2564 : Don't send duplicate ACTION_NEXT_ITEM or ACTION_PREV_ITEM within 2 seconds when video to music is playing to avoid MP hang. It should solve hang into MyMusic / MyPicture (during slideshow between with resume/pause music)."

This reverts commit 0a2f6870e43ace36f39a54aa4edc23607ed86fbb.