Revert "Fix CarrierServiceConnection binding leak in CarrierConfigLoader" am: b0f3e2f004 am: 19d70e11c5

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

Change-Id: Ic9f85529196f12a77be14575c91922a32fd869fc