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

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

Change-Id: I0f460d504e45f8400768c8173f541cdc82a31f5b