Refine atom definitions for memory metrics.

Defines following atoms:
 -- AppStartMemoryStateChanged
 -- ProcessMemoryState
 -- LmkStateChanged
 -- LmkProcessKilled

These changes are based on the discussion with WestWorld team.
See: go/android-p-memory-metrics
Bug: 72177881
Test: Manual

Change-Id: I884f23f3d7627440af5faa25f9479ba0d8763bec
1 file changed
tree: 88b0cc5ca9c50009239a56ce47462a476873aed2
  1. atoms.proto