Differentiate seamless rotations in shell transitions

Shell owns the whole display rotation animation now. So, we
can just provide enough information for it to decide when
seamless is requested/appropriate. The default behavior (when
not explicitly animating) is already a jump-cut/seamless, so
just skip the rotation animation if we are doing seamless

Bug: 194693472
Test: atest SeamlessAppRotationTest ShellTransitionTests
Change-Id: I64748f5910c04784fd9818818b029fa5f1339c6c