Windows for accessibility with wrong coords on rotation.

We were handling rotation changes for accessiblity in the window
manager too early, before the rotation animation completes. This
lead to wrong window positions being reported to the accessibility
layer. Now we handle rotation for accessibility when the rotation
changes, if we will not animate, or after the rotation animation
completes.

bug:17457240

Change-Id: Ia772f4886bfdbe0f9bc9003c12f36b2fbd6f45ec