HFP: HeadsetStateMachine logging clean-up
* Enable logging at critical code path to indicate connection status
more clearly
* Disable duplicate logging statements to reduce log spam
* Simplified method usages to reduce code size
* Remove unncessary null checks such as device null check in CONNECT
message, we should crash if device is null in CONNECT message
Bug: 63775402
Test: HFP PTS test, HFP regression, no functional changes
Change-Id: I97d3e82e3e5cf3e4e2b702f6b3d8d054e0962272
Merged-In: I97d3e82e3e5cf3e4e2b702f6b3d8d054e0962272
(cherry picked from commit c6231925ec13a432770a879c49b3c4f008ee96e1)
3 files changed