Format ThemePicker .kt files am: 2351412212 am: 96a6c15a05

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/20114531

Change-Id: I8bb8c836ac9686c707b2c7df67b1cb46ee3b930d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>