Merge "Move unknown state to 0 and shift up others per the guidance of metrics...

Merge "Move unknown state to 0 and shift up others per the guidance of metrics council" into udc-dev am: b9186790

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21899899



Change-Id: I2e35d1e03f43a80c751e6b3073b18a5eaf973179
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>