Fix OneHandedGestureHandler incorrect InputMonitor behavior

1) Fix CTS WindowInsetsBehaviorTests test fail in NavBar 3 Button mode
   When device set NavBar 3 Button mode, OneHandedGestureHandler
   will monitor the InputEvent and pilferPointers() over NavBar region
   and break WindowInsetsBehaviorTests
   a) systemGesture_excludeViewRects_withoutAnyCancel
   b) systemGesture_notExcludeViewRects_withoutAnyCancel

2) In landscape, disposeInputChannelInputMonitor in OneHandedGestureHandler

3) Add dump in OneHandedGestureHandler for bugreport

Test: atest android.systemui.cts.WindowInsetsBehaviorTests
Test: manual test check the UX feel good on 3 Button mode
Bug: 181025710
Change-Id: I4c30578f45e5a569d7b5a1698d3d30229cecb13f