* Use isRegistered() from the more narrow UserIdentity interface.
* More specific type hints.
* Remove comments that literally repeat the code.
Change-Id: Icd0eaf8236be41b258efcf81d581540d2448e9e3
Stop additional conditional hook if MW < 1.37, and move the check
to inside the hook itself
Bug: T299305
Change-Id: Ied1c5c0beee015d7b0a8d6bd750346f4a8a5aaa1