Fix hard to touch and stuck navbar rotate icon

Hide rotate button on Quickstep navbar grab. Prior signals
didn't always capture this. Launcher now also changes its
requested orientation on touch, ignore that. Pause callback
made hide animator unexpectedly isRunning=true causing the
icon to never fade out, should be fixed now.

Test: manual
Change-Id: I4bb39d57d9cef5748aadf2f18c640feba3f53775