only mp_state has new state send FFP_MSG_PLAYBACK_STATE_CHANGED msg (cherry picked from commit 9716aed2662d7fad6f8383595b05c9ec08ff1b02)
only mp_state has new state send FFP_MSG_PLAYBACK_STATE_CHANGED msg (cherry picked from commit 9716aed2662d7fad6f8383595b05c9ec08ff1b02)