Update SubscriptionInfoUpdater to use TM#getCarrierServicePackageName

The implementation for TelephonyManager#getCarrierServicePackageName
has been highly optimized. Internally, the cached values are directly
returned instead of performing a heavy query from package manager.

Besides the performance improvement, the switch may also largely reduce
the deadlock and IPC thread blocking due to the removal of IPC
call in most time.

Bug: 217442920
Test: atest SubscriptionInfoUpdaterTest
Change-Id: I3545bd3b807c9efe5ea525b0bf6ebde42386486a