tree 83f18430a833bce1f059ea32d83a0266cbc42fa3
parent 6567fa2d9d9d4f30e9ff5d1eb17794fae4771458
author Zhihai Xu <zhihaixu@google.com> 1389210317 -0800
committer Zhihai Xu <zhihaixu@google.com> 1389210317 -0800

increase the bluetooth task priority when start a2dp.

change the BT task priority based on audio play state.
increase the BT task priority to ANDROID_PRIORITY_URGENT_AUDIO
,when start ad2p audio playing.
to better prevent CPU premption by other process/task(UI).
restore the BT task priority when stop a2dp audio playing.

bug:12082841
Change-Id: I34e8344cffea87f68987149c820cd3e84a4196d1