Merge "[Device Config] Ensure every config has a default setting." into tm-dev am: 81d47257 am: fa50f290 am: 910fb785 am: 2c65cfc5

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



Change-Id: I82f7f5154627898a92ef3c121d8a41bfd5ad0e5b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>