Fix snapshot starting window isn't apply fixed-rotation with IME visible

As IME window will be hidden by AsyncFadeAnimationController when
receiving IME show request in IMMS side during fixed-rotation.

we could remove the previous logic from CL[1] in case snapshot starting
window surface may not apply fixed-rotation when IME snapshot visible in
the first place, since in CL[2] has already removed the disable
fixed-rotation when animating snapshot starting window with IME visible.

[1]: Idfdf129adbfbee6634d8a27aa78da1f631bd213b
[2]: Iceaedbfdb75e68e9f7fb8fd4a1bf8f35a779797e

Bug: 230733128
Test: 1. Launch a portrait app which keeps showing IME. (e.g. Chrome)
      2. Return to home be home key or swiping.
      3. Hold the device in landscape.
      4. Launch the app again.
      The app should show in landscape directly and IME will
      fade-in when it is drawn in landscape.

Change-Id: Ieb656aaa9f76d0f5dcc5487a6602e528ec771552