Merge "Prevent multiple calls of ActivityThread.systemMain()" into rvc-qpr-dev am: de3b7f1aea

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13365411

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iad8fb5c18c68300b2c01548abd3798cfccb445a5