give the proper orientation to the h/w composer HAL

we were using the "orientation" value instead of the
real transform, which may contain arbitrary rotations for
instance, and in some case ended up with a final "orientation"
that looked valid, but wasn't.

this fixes a problem on devices with a h/w composer hal where
the rotation animation looked weird.

Change-Id: I4be8a2a1bde49c33456fcf5c8d87ab515c216763