Fix Skia pipeline readback for non-portrait mode (part 2)

Apply correctly the image trans form matrix passed to
SkiaOpenGLReadback::copyImageInto. This is a fix for capture when
screen is rotated on 180 degrees.

Test: Ran CtsViewTestCases CTS tests for Skia pipelines.
Bug: 63629735
Change-Id: I2b86390352feb2538ad1591b18aa5e5a175f4c95