Android smoke: 'keyboard dismissal should change emulator pixels' flakes on unrelated PRs #4264

Purpose

The Android smoke lane fails on PRs that don't touch Android or the keyboard, with:

AssertionError [ERR_ASSERTION]: keyboard dismissal should change emulator pixels

Occurrences

• refactor(limrun): drop the unused iOS app-alias seam and stale AX-backend wording #4243 (Limrun iOS cleanups and docs) at f958c63, 2026-11-06: job 127717160690. It passed on rerun.
• fix(daemon): keep a session closable while close withholds its device claim #4263 (daemon close session logic) at 84d0daa, 2026-11-06: job 127803322350.

Current behavior

The assertion is in test/integration/android-emulator-e2e/live-form-scenario.ts. It compares emulator screenshots before and after a keyboard dismissal, and fails when the pixels are identical. The likely causes, both unconfirmed:

• the dismissal hasn't finished animating when the second capture is taken;
• the keyboard was never shown, so there was nothing to dismiss.

Required behavior

• Find out which: capture the keyboard state before and after on a failing run.
• Make the check wait on an observable signal, such as the IME window being gone or the snapshot no longer showing the keyboard, rather than a pixel change at a fixed point.
• Don't remove the check or loosen it to pass on identical frames.

Completion conditions

• 10 consecutive Android smoke runs on PRs pass this step.
• A run where the keyboard was never shown fails with a cause that says so.