[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 am: 3cae8b67 -s ours

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

Change-Id: I587cfaa175799c518026eb4bfd409e8d84551271