base

Fix calls to Rect.intersect(Rect) in package com.android.server.wm

This CL checks for the return value for Rect.intersect(Rect) for whether
there is actually an intersection before taking the calling rect as the
intersection. In addtion, this CL handles the cases where there is no
intersection (Rect.intersect(Rect) returns false).

bug: 7368679
Change-Id: I7d5ef7059ac432170470a108c0d6dece230ec0b3