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: bf585f48 am: 83dddfde am: d062af3a

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



Change-Id: Ia664a6eb6b1bfb307797f24015516378250f2a64
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>