Add onStateMutated() callback for listener dispatching.

This solves the issue of new state visibility when we invoke
externally provided listeners - they may check the current state when
they are called and they should always see the new state, but
currently they may see the old state if the thread mutating the state
hasn't finished mutation.

The onStateMutated() callback provides a way to invoke the externally
provided listener at the right time (after state mutation is
committed), so that they can always see the new state without worrying
about the race condition. Meanwhile, this also provides a good place
to consolidate the invocation for listeners like
OnPermissionsChangeListener which only needs to be invoked once for
each UID.

Changed the listeners to use abstract classes instead of interfaces
for slightly better performance in accordance with System Health
team's guidelines.

Made the OnPermissionsChangeListener only notified when runtime
permissions are changed. Previously we had the code to notify it when
permission flags for install permissions has changed, however the
PackageManager permission flags actually should only be applied to
runtime permissions. Meanwhile also existing grantRuntimePermission()
may grant a non-runtime permission like a development or role
permission, the existing implementation actually doesn't notify the
listener in this case, so notifying for flags change that doesn't
happen while not notifying for grant state changes makes even less
sense.

Bug: 252884423
Test: presubmit
Change-Id: I1f973e5e3c0ad4aa6ae23f6e238aef5aafa66e2e