Merge "Limit the number of supported v1 and v2 signers" into rvc-dev am:...

Merge "Limit the number of supported v1 and v2 signers" into rvc-dev am: 00f3afec am: d8cdf2d9 am: b4784aeb am: 027abf19 am: 6cc59ca4 am: 35b54f3b am: 7bf6db07 am: 9082dce8 am: cb9649cb am: 509461ed

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22390145



Change-Id: Ia3f45ee9c27620340d40b7315502b4a82138d089
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>