Expose the onCarrierPrivilegedAppsChanged as SystemApi

(cherry picked from commit 0016eefe11eeb35f1ab6ad91cc255e5c9edbaf61)

Bug: 145944877
Test: N/A
Merged-in: I0fd32f38587ae46d1d170bc8353d23bbc9928cd0
Change-Id: I0fd32f38587ae46d1d170bc8353d23bbc9928cd0
2 files changed