Fix supported routes wrongly include bluetooth issue

setSystemAudioState is acting on mLastKnownCallAudioState, which was never updated to account for the change to mAvailableRoutes. This will make HfpCall's supported route wrongly include bluetooth.

Bug: 292599751
Test: unit test

Change-Id: I155972995a35b5eed01b307bc16ae026449ed3e4
4 files changed