Deprecate ImeTracker phase disabled user animation

This removes the usage of and deprecates the
PHASE_CLIENT_DISABLED_USER_ANIMATION, as this is no longer valuable
(follows another phase without code branching off), since [1].

In parallel this also handles the code branch above using the
PHASE_CLIENT_CONTROL_ANIMATION to avoid a potential request timeout.

  [1]: I3210df9bcc087f5fba712e0e7ac4922475c3b88d

Test: n/a
Bug: 305899730
Change-Id: Ie20283a72ba463231c3fa5f54b7255057548c361