WindowManager ProtoLog feature

This CL implements the on-device part of ProtoLog
- the new logging system for WindowManager.

Design doc: go/windowmanager-log2proto

Change-Id: I2c88c97dabb3465ffc0615b8017b335a494bca59
Bug:
Test: atest FrameworksServicesTests:com.android.server.protolog protologtool-tests