Update DisplayMetrics when resizing

Previously the DisplayMetrics passed to a new ResourcesImpl
object would be generated from the default DisplayAdjustments.
We now use the correct DisplayAdjustments for the ResourcesImpl
and make sure to update them for things like rotation changes.

Bug:29619314
Change-Id: If2ba0d7670a4554dcd3fde9766e2337f20a191fd
(cherry picked from commit 8e8d2321)