cketcham 50e96399fa Handle BottomAppBar with no FAB
This change allows the BottomAppBar to not show a cutout if the FAB is not anchored to it using the CoordinatorLayout anchorId, or if the FAB is not visible. This change also allows the BottomAppBar to listen to show/hide animation changes so it can synchronize its animation to hide and show the cradle with the animation to hide and show the FAB.

PiperOrigin-RevId: 188024600
2018-03-12 12:54:31 -04:00
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