Also factor the floating rotation button into the active touch region

- The floating rotation button sits in the gesture region and touches
  over the button should not start the recents animation. Add a
  visibility callback to the floating rotation button in addition to
  the existing contextual button listener and update when needed.

Bug: 162775448
Bug: 161921293
Test: Repeatedly rotate with floating button
Test: atest SystemUITests:NavigationBarRotationContextTest

Change-Id: I798370b41041e4f02bb82f5aeb20b9ccc1d2a4e8