Force a layout pass if the display rotation changes
Bug:
7687209
DisplayRotation is used to map camera orientation to the display and is
updated in layoutContentPane(). However, in the case of a 180 rotate
framework doesn't send an onConfigurationChanged nor does the layout
dimensions change, thus layoutContentPane doesn't fire and we don't
update mDisplayRotation, resulting in an upside-down preview. To handle
this, check each draw whether or not the display rotation has changed
and if it has force a layout pass.
Change-Id: I610ea235d1bf7de2743f4cdb8e42ba1ddcb41404