Revert "Fix CarrierServiceConnection binding leak in CarrierConfigLoader" am: b0f3e2f004 am: 68ad730f13 am: 041aa6831b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/16142592

Change-Id: Ieb6a9c11b1cb4678f2538dc266bfd9f0d8e030d6