Add bluetooth as a supported route when we actually eneted a bluetooth

route.

Sometimes we can't add bluetooth as a supported route when it connected,
so the device actually audio connected, we failed to update call audio
state correctly. Fix this by also updating support route mask of the
call audio when the current route changed.

Bug: b/301695370
Test: atest CallAudioRouteStateMachineTest
Change-Id: I22b37ba8483ef8cc427aaa10b6c7d70fb31c8245