Merge "Listen to changes in unused threshold" into sc-dev am: f71b630674 am: 79dbb674a9 am: db584e4852

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Permission/+/14923257

Change-Id: Ibcdf3c163c62621c094a8f2c373d38d353577d19