Merge "[Device Config] Ensure every config has a default setting." into tm-dev...

Merge "[Device Config] Ensure every config has a default setting." into tm-dev am: 81d47257 am: fa50f290 am: 910fb785

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18619288



Change-Id: Ib24a26ae33be4ab340f5c4727e21f5c6a748c607
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>