libaudiohal@aidl: Support clip transition reporting

If the AIDL HAL is at least V4 or it advertises clip
transition reporting support via parameter
'aosp.clipTransitionSupport' then expect two calls
of 'onDrainReady' callback for the "early notify" drain.

Add tests to validate this behavior on the client side.
Tests are also gated by the reporting support.

Bug: 370117758
Bug: 373872271
Bug: 384431822
Test: atest audiotrack_tests
Test: atest CoreAudioHalAidlTest
Change-Id: Iaf459298c46d60e3f8878dbf1f4505c1e8d9a9b0