Fixed issue with the bottom zone of launcher is not touchable.

Updated logic of the touch area configuration. Only add the taskbar
bounds if the taskbar is being shown inside the app or on overview.

Fixes: 358301278
Fixes: 361653416
Test: Manual:
http: //recall/-/gx8ASgewUeUS3QYohfrd1J/lpzJER3iGI5PpZrQqv7b7
Flag: com.android.wm.shell.enable_bubble_bar
Change-Id: Id9902058c5ec873dab6257a34b4c3a87aec5ae6b