fix: Don't show "CRT animation" option if electronbeamfades

-The "if" statement here is designed to make sure that electronbean fades == false
and that mCrtMode !=null because if electronbeamfades == true then you can't change
the "CRT animation"/mCrtMode option. So the "else if" statement is not supposed
to remove animationOptions ( that removes all settings under "DISPLAY AND ANIMATION
OPTIONS" ), It is supposed to simply remove the single setting "CRT animation"/mCrtMode
if electronbeamfades == true.

- This is also a more proper fix for "fix: 'display and animations FC'
https://github.com/scotthartbti/android_packages_apps_Settings/commit/23a5414fb213dc6b838f3c5cbe1e79a2b6f06e0f

Change-Id: I0c0e16f4d3fd7df0ad0125545b633f58f1d20e40