Add early exits to visitGrantableUri/calculateGrantableUris.

This is to improve the performance of the URI checks by avoiding
unnecessary calls. Also added a trace so that we can track this moving
forward, and figure out if it needs to be improved further.

Note that the tests had to be updated because calculateGrantableUris
initially got called in the constructor before we mocked the
UriGrantsManager (which should, by the way, only be visible for
testing), which populates mGrantableUris, so the early exit kicked
in. Normally, calculateGrantableUris should only be called once in
the constructor, so that's what we should be testing.

Test: atest NotificationRecordTest NotificationManagerServiceTest
Fix: 284193006
Bug: 281044385
Change-Id: I44005e4a3d083c9ed9e8dda6918f5c9a2b932d93