Added exclusions and calculated a default bouncer region

This change examines a list of exclusionRects, these rectangles might represent area where another application is overlaying content and wants
to reduce the area to trigger the bouncer's swipe trigger, if an exclusion rectangle overlaps with the default bouncer region, the method
will shrink bouncer region

Flag: NA
Test: atest DreamOverlayTouchMonitorTest, BouncerSwipeTouchHandlerTest
Fixes: 327003425

Change-Id: I83b82168354a3da134af658ee672d4ae343e8d97