Merge "Add ability to read flag values to Flag Library." into sc-v2-dev am: 6c8ebb114f am: 96f9c9e5b5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16101192

Change-Id: Ib5032980723d93f83925139a332c14ebf353aa5d