Merge "Introduce SignalStrengthUpdateRequest to customize signal update request" am: 775a1db2c2 am: b581010b53 am: c7e48ceedf

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1532958

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8ad14ecc985b99dfc8c94f457d0f00b273743779