Refactor bubble access to package manager

Bubbles use package manager to resolve app info, which causes
test failures in robolectric. This change refactors this logic
to allow us to use a fake for testing.

Bug: 416801340
Flag: EXEMPT refactor to fix test failure
Test: atest BubbleControllerTest
Change-Id: I854f2a0c6cf637ef9a3de024e3d09e1c650d5e5b