Sessionize STMiddleware logging

- Migrate STMiddleware to EventLogger
- Keep separate loggers for each session to prevent over-runs,
in addition to a service wide logger
- Keep a cache of recently detached session loggers

Bug: 272147641
Fixes: 274970620
Test: atest SoundTriggerMiddlewareLoggingTest
Test: Manual verification of dumpsys and logcat formatting
Test: Manual verification of dumpsys after detach
Test: Manual verification of logcat
Change-Id: I69bc716ce739b6ad69d7afb31e1699b1625ee3c0