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 am: 577f30bf am: 7d094af1

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

Change-Id: I8c446fb78254703802680a9231d842662ef42cf5