Improve CarrierPrivilegesTracker with new CarrierConfigManager APIs

This CL improve the performance of CarrierPrivilegsTracker with the
new introduced CarrierConfigManager API:
- Replace carrier config change broadcast receiver with listener
  which has much low lagency
- Retrieve subset of carrier config to reduce memory consumption

Bug: 244087782
Test: atest CarrierPrivilegesTrackerTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:d58fa9e0c73d10ec33ceabe05081b6ca0b8a8e3f)
Merged-In: I1d3a49a0d669fed4c6db08364c9e1c9f7f5f1eb8

Change-Id: Ie221757e2a47217a860ff5c709326a837f780f12