Bluetooth-A2dp: Serialize Disconnect/Connect A2DP calls

Supress noisy intent call to audio service will be delayed
based on the delay that was sent during previous disconnect
attempt, so that the connect/disconnect calls to audio service
are seiralized.

CRs-fixed: 2268408
Change-Id: Iea5ee01a70803b73993d3662c0e9f1ec578ca014
1 file changed