Revert "Revert "Pass Long press assistant start, complete, cance..."

Revert submission 33530799-revert-33464207-support_gemini_power_key_animation-OWWMRETITV

Reason for revert: Tested locally but the reported tests pass (falsely reverted): Will test on ABTD to confirm

Tests are failing with or without CLs: Some other issue.
Without CL: https://android-build.corp.google.com/builds/abtd/run/L46300030012099882
With CL: https://android-build.corp.google.com/builds/abtd/run/L46300030012098202
Reverted changes: /q/submissionid:33530799-revert-33464207-support_gemini_power_key_animation-OWWMRETITV

Change-Id: I22dfad959788c20f36201445c7bdcbb71d5a9575