Only ignore rotation update if recents animation is on top

Otherwise the display rotation is not updated after switching
activities in different orientations by quickstep gesture. E.g.
Swipe from a portrait activity to a landscape activity, the
landscape activity will show as portrait.

Bug: 157447718
Test: atest DisplayContentTests#testRecentsNotRotatingWithFixedRotation
Change-Id: I4469dd668ecdb0d299395e0c5536c2f00c80a84d