Merge "Prevent default wellbeing app from falling below WORKING_SET bucket" into rvc-qpr-dev am: 711cdc2220 am: 70bfab0dd2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12663452

Change-Id: I7c25eebae28aff771f8a035cf39ec69752dc018a