[automerger skipped] Merge "Adding package caller to prepareForUnattendedReboot." into sc-v2-dev am: bb87d10801 -s ours am: 39811af405 -s ours

am skip reason: Merged-In I566a32237dcd00e63d24619a403b9a14f7c85925 with SHA-1 cd3aef2a17 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/15925043

Change-Id: I482e3c15b5d413000f0e8a5e0fb435263156480e