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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I81185a075607b54ab1a336a75dd93831b7cdee4a