Ensure MediaProjection dialog switches are only toggled within target region

Moving the switches for MediaProjection dialog into a transparent parent container and adding a manual onclick listener, so that switches will not toggle on click events that are dragged outside the target region

Fix: 308519160
Flag: None
Test: Manual testing
Change-Id: I0da7e4f65c8c55d6fe55af6661eb08ebe30b8079