Merge "Show more accurate message when call fails due to thermal mitigation." into sc-dev am: 416bd09111 am: 5ec91b6b9a

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/14740479

Change-Id: Ifb0fff1dbefc82ef6738ed87aafd5f2b79b89ac8