Apply fixed rotation when showing snapshot starting window

Unlike splash screen starting window that inherits the size of
activity directly, task snapshot needs the final size to draw right
after adding to display. Otherwise the content will look like as
cropped because the surface size uses different orientation.

And because starting window is added before executing transition,
assume there will have transition if the owner of starting window
is also the top activity.

Bug: 155862858
Test: ActivityRecordTests#testFixedRotationSnapshotStartingWindow
Change-Id: Idb4f9a92a6e2594356416afd0ab6360e94e66497