Revert "Revert "Fix CarrierServiceConnection binding leak in CarrierConfigLoader""

This reverts commit 7d5d88da3d9564c469b62581d9a3c3d384ac19a7.

Reason for revert: Build break

Bug: 205589978
Change-Id: I8ffd37a11646fe4f36dcb4eaccd37a204b47958b
Test: make
1 file changed