Fix crash of resource not found am: 64d53e549c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24083114

Change-Id: Ibc4c7b10e901b359ad1b4c14b1652c434987f3d5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>