Merge "Change tile states strings to constants" into sc-dev am: e9d4150c am:...

Merge "Change tile states strings to constants" into sc-dev am: e9d4150c am: 044f8526 am: 028b66f3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15144191

Change-Id: I3519b6cb23b386dde46b3e40d6620f60258445b5