Add ImeTracker phases for the invokers

This adds a new ImeTracker phase for reaching the
IInputMethodClientInvoker, and the IInputMethodInvoker.

Flag: EXEMPT logging
Bug: 404819907
Test: open Chrome; adb shell am force-stop com.android.chrome
  observe ImeTracker logs
Change-Id: Id8541be807dbc873a2440d8661348905b1a884a7