Add new method notifyComponentUsed.

Define a new method notifyComponentUsed that is being called when app
component (except broadcast recevier) has been used. This is the first
step so that it could be easier to change the reaction of
PackageManagerService on such event when needed. This CL should work as no-op.

Test: Manual
Bug: 269127435
Change-Id: Icc62c0aa132942bb758db66f214fdf047844398c