Merge "Revert "Revert "Fix CarrierServiceConnection binding leak in CarrierConfigLoader""" am: 9408ba2d48 am: c4f74be16e

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1884948

Change-Id: I5e23e41049cef5ef7ff02483a7980e6c259ae6d9