Don't apply remote animation on IME when keyguad is going away.

Test: manual.
  1. set lock mode to password
  2. push power button to go to the lock screen.
  3. swipe up to show password input screen.
  4. input correct password.
  5. verify keyguard is faded out without flicker.
Bug: 191518142
Change-Id: Ia9b55d786fda040df658889c90040326d5c8aa6a