Add test cases for window input with overlap window

- Add test to watch if a view could filter touches when obsecured if
  an overlap window exist.
- Add test to watch if a view could receive touches when it set filter
  touches when obscured and pointer location is on.
- Add test to watch if a window becomes to non-touchable, the touches
  should go into another window.

Test: atest WindowInputTests
Bug: 158717144
Change-Id: Iea550a794df192d569cac853c767853395704d6c