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This replaces accepted state properties in badges with a new BadgeState
enum. This will allow for more states to be added that help the UI to
handle more complex arrangements such as temporarily showing a badge whose banner
is presenting when there are multiple badges. When BadgeItems are initialized,
they will take a BadgeStateNone state for now. It will likely change as
more states are added.

Bug: 976901
Change-Id: I0eb0755cbf4fd41cd883aecc10a767d781af70d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1810766
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699812}