Enforce Coordinator encapsulation w/ Dagger

This allows for marking Coordinators with @CoordinatorScope.
Attempting to inject a Coordinator marked with this scope elsewhere in
SysUI will result in a build error.

This does *not* prevent marking Coordinators with @SysUISingleton,
which would allow for injection elsewhere.

Bug: 204468557
Test: mp droid
Change-Id: Ie79d632eb150790e6a9580b2c955af861bb2d182