Add asyncTraceForTrackBegin and asyncTraceForTrackEnd System APIs

- Upgrade these APIs from hidden to System API.
- These tracks will appear under TRACE_TAG_APP, which is currently hidden.

Test: m -j
Bug: 407831889
Flag: android.os.async_trace_for_track
API-Coverage-Bug: 409782350
FCRS_CODE : m9bwobgaccsddp

Change-Id: Ib7d9e0257c8f45455e590e2bedc3ae60a324cf3b