Only use WM screen rotation animation on default display

Configuration changes cause WindowManagerService to freeze any displays
with activities, which causes a screen rotation animation to be applied
to those displays. However, ScreenRotationAnimation always uses the default
display, so it shouldn't be used for non-default displays.

Bug: 63682998
Test: manual
Change-Id: Ic66c6e47c030393fbbe5ecbfecd90d4929871349