Merge "Warn when running activity from 32 bit app on 64 bit devices." into udc-dev am: bf11cb24

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23320254



Change-Id: Ieeb1c753b67ede34e8c3e47855c0e178c9b397ea
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>