Fix the issue that on tablet/unfold, the allapps background color is wrong. am: aa6612d3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/24030571



Change-Id: I513daa1fdeb8d5582bd0cec9b8b2eb4d043f2543
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>