Apps normally use context.getResources().getDisplayMetrics()
or getWindowManager().getDefaultDisplay() to get information
about the screen dimensions. Not all the screen space is available
for apps in a multi-window environment, so we limit the dimensions
of the display object exposed to the app to that of the containing
stack.
Bug: 19225079
Bug: 19354838
Change-Id: I8dc3a6c9b99ecedcca28fc4ddaba9f31feb4f871
7c72668f19