Only assert transform hint if the orientation of size is changed

The test may be failed by
1. surfaceChanged: width=720 height=1024 transformHint=0
2. surfaceChanged: width=720 height=1120 transformHint=0 <--
3. surfaceChanged: width=1184 height=560 transformHint=4

The height change could be from insets which should be fine.
The purpose of the test is to ensure the size and hint have
consistent orientation, so ignore the noise case.

Fix: 294582810
Test: SurfaceControlTests#testSurfaceChangedOnRotation
Change-Id: Iefab4381934e655a4fa4217cbb94495de5f3ddfb