Define CarrierPrivilegesTracker for tracking CarrierPrivileged UIDs.

CarrierPrivilegesTracker is defined for tracking Carrier Privileged UIDs
for a specific Phone. CarrierPrivilegesTracker will monitor for
CarrierConfig changes, SIM state changes, and Package
installs/uninstalls - each of which can impact which UIDs should receive
Carrier Privileges.

Telephony currently has no centralized source for tracking Carrier
Privileges. Carrier Privileges can be queried via
TelephonyManager#hasCarrierPrivileges and by checking the Carrier
Configs for included certs. With CarrierPrivilegesTracker, internal
Telephony apps will be able to enumerate all Carrier Privileged UIDs for
a specific phone.

Bug: 147391402
Test: Tested on crosshatch build
Change-Id: I903805d6085dca13cfc05ecc01a8c439061bcc60