Merge "Temporarily disable `testBackgroundDexOptDowngradeSuccessful`." am: f4daf639 am: 6d8ee15a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2448063



Change-Id: Iadbec35bce324af8a585c7a16c0019663036b86e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>