Fix HintManagerServiceTest with mock PackageManager

In previous ag/27776376 we added querying to packagemanager
but didn't add corresponding testing to this, thus this patch

Bug: 347120905
Bug: 347112027
Test: atest HintManagerServiceTest
Change-Id: I15da43b7d795a868d46c8dfd038585f2a8c8cda2
1 file changed