[automerger skipped] Merge "[DO NOT MERGE]Revert "Relax minimum signature...

[automerger skipped] Merge "[DO NOT MERGE]Revert "Relax minimum signature scheme version for apps on system partition"" into sc-v2-dev am: 70260553 am: ff844f43 -s ours am: aeb6b72f -s ours

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16943318

Change-Id: I18882b188075bfdf46677d5d9256a39e1df878cc