Merge "Zero jank IMF 3/N" into main

core/api/current.txt

core/java/android/view/HandwritingInitiator.java

...id/view/inputmethod/IInputMethodManagerGlobalInvoker.java

core/java/android/view/inputmethod/InputMethodManager.java

...va/com/android/internal/inputmethod/IBooleanListener.aidl

core/java/com/android/internal/view/IInputMethodManager.aidl

...android/server/inputmethod/InputMethodManagerService.java

...re/java/com/android/server/inputmethod/ZeroJankProxy.java