Merge "Don't send thermal mitigation request to modem if not supported." am: c17eb3d1c8 am: 45494dcc2c

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1621947

Change-Id: I10ae94a33cd4b5470bf24b737b5b3f4e07fbe097