Merge "Perform validation on SignalStrengthUpdateRequest" am: 09c38509a0 am: ab87403828 am: e4832c8f6f

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1545044

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I7fb84753d8727d97fc49d406e70d114fc4f4c006