Revert "[Improve fill dialog] Get IME updates to autofill"

Revert submission 31356655

Reason for revert: b/392260394

Reverted changes: /q/submissionid:31356655
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:9f765b7e7f0e700913de8a0a23a353f1ab015900)
Merged-In: I3090903aad9f9626d23713563821824b3800e253
Change-Id: I3090903aad9f9626d23713563821824b3800e253