Rotate quickswitch task thumbnails

Previously we were only rotating
thumbnails if the difference between
them was portrait vs landscape, so
a thumbnail in seascape with the launcher
in landscape wouldn't be rotated.

fixes: 143892437
Test: With launcher in portrait
* Thumbnail in reverse portrait,
landscape, seascape, normal
With launcher in landscape
* Thumbnail in seascape, normal,
reverse portrait, landscape
With launcher in seascape
* Thumbnail in seascape, normal,
reverse portrait, landscape

Change-Id: I1dd82428c05e4338a90ddb7b381fe920735f7cfd