Improve the cold start time am: 708b84a728 am: 8069ac746b am: 42d58c5e7d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/WallpaperPicker2/+/15142880

Change-Id: Ic5b64f1743240ed86f0f42a5953e4554443750eb