Merge "Relax minimum signature scheme version for apps on system partition"...

Merge "Relax minimum signature scheme version for apps on system partition" into rvc-dev am: 67cb3a61 am: 24fd285d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11885723

Change-Id: Ib0560796b8e10bc74a26bca02de35d96358fe12c