Defer onIsStashedChanged() until all controllers are initialized am: aed0c4d73e am: cc10db044f am: 96c5c67dca

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17921731

Change-Id: Ia3625ff9b17b348790926c217d48f48782ab2a6a
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>