A2dpSink sends CONNECTED instead of DISCONNECTED when connection

timeout

When a timeout happens for an outgoing A2DP Sink connection we are (most
likely a typo) sending a CONNECTED instead of DISCONNECTED event. This
confuses the UI and shows it as connected instead of disconnected.

Change-Id: I2fc5a9df86781b45e5c5ff9368a7c49c6c910294
(cherry picked from commit 688344c5)