Create new DeviceProfile when in multi window mode.

This is just a first pass to help make the codebase ready for MW mode.
ie. won't see the effects of this unless resizeableActivity is set to true
in the Android Manifest.

Also allows long clicks from edge when in MW mode.

Bug: 32176631
Change-Id: I48e5cb3bd15e70627d9bf007d93bc731612fba2e