Fix can't find default theme bundle for some specific languages. am: 2919222db3 am: f52614164e

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/13277991

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I19c38411536ce35fd41a29ec3f03eb0c3a4e4f56