Apply interface change of showViewOnlyPreview() am: 3e5a805a12 am: 121dab24d4

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/11759259

Change-Id: Ie03d8625e8b75bb4b722d2508a6da301fe6fd2cc