Merge "Move reading sysprops out of the Flattener." into sc-v2-dev am: 5bfe834337 am: b2ebc2585f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15674762

Change-Id: If52a34a1d988d7b6febfd35cad345f839f35b2fd