Merge "Create BIGPICTURE_NOTIFICATION_LAZY_LOADING flag" into udc-dev am: fa2f9840 am: 9dd97490

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23280573



Change-Id: I864816da5a59b00e0cbdf940b2ad46b3a2e50502
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>