Merge "Revert "Fix default mode for system alert window on low-RAM device.""...

Merge "Revert "Fix default mode for system alert window on low-RAM device."" into tm-dev am: 074f4aa6 am: 569c49b5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18365482



Change-Id: I978480bce36f57915621a43b27885e99c3361031
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>