Revert "CarrierConfigLoader: IPC call with invalid subId will silently fail"

This reverts commit 9d1ae4ac1f089eda4132188d204211e754e6e11c.

Reason for revert: parent CL aosp/1652975 break CTS cases

Change-Id: Id718a09c15f5841545c5cd8a66966b109af054e6
2 files changed