Do not update position to remote when music is paused

issue steps:
1) music app is playing.
2) pause music.
3) open navigation app to navigate.
After 3), the play postion at remote carkit will be updated.

for non-media app like map navigation, when it begins to
play, a2dp will be started. Host should only update
playing to remote, but should not update play position to
remote.

Change-Id: I8c3a665574193d0a560f4343e9587f20aff07385
CRs-Fixed: 2349809
1 file changed