Disable fixed rotation for starting window with ime surface

The IME window may show later depends on whether the task snapshot
contains the snapshot of IME surface, and whether the edit view
is still focused. If display orientation is changed, IME window may
take longer time to redraw. That requires to adjust the timing
of the removal starting window to avoid flickering.

For short term, just fallback the case to legacy behavior that
applies normal screen rotation animation.

Bug: 160451808
Test: Launch a landscape app which opens IME from portrait home.
      Return to home and launch it again. The IME window isn't
      flickering in 2 orientations.
Change-Id: Idfdf129adbfbee6634d8a27aa78da1f631bd213b