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

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

Change-Id: Ie2d2662732a33e5dd54a3d7106362eda8853e814