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

Merge "Move unknown state to 0 and shift up others as per the guide of metrics council" into udc-dev am: 0625c508

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21808861



Change-Id: Iee4381c765119f1911d819a4680438fdc4790754
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>