Replace internal APIs by system/public API

Sometimes internal APIs are just convenience wrappers for system/public
APIs. Sometimes proper system/public APIs were added after code was
written and the code can be simlified.

Do this or the instances in permission controller where possible

Test: Surfed around permission controller
Bug: 110953302
Change-Id: I3fe8f124a3865a38219a132dc8c1dae48eca7f7e