Update CarrierConfigLoader to use TM#getCarrierServicePackageName
The implementation for TelephonyManager#getCarrierServicePackageName
has been hightly optimized. Internally, the cached value is directly
returned instead of performing a heavy query from package manager.
Besides the performance improvement, the switch may largely reduce
the deadlock and IPC thread blocking due to the removal of IPC
call in most cases.
Bug: 217442920
Test: atest CarrierConfigLoaderTest
Change-Id: Id128e9df7a3d4460d789e5455ff6b5745c374183
2 files changed