#3606 fix(android): reinstall and reselect the test IME helper after it disappears

Summary

open remembers per daemon that it installed the test IME helper and never checks again, so once the helper is gone (uninstalled, -wipe-data, or an emulator snapshot from before the install), the next open leaves the real keyboard active and succeeds (#3407).

• A remembered install now re-reads the installed version code (one cmd package list packages --show-versioncode, about 34 ms on an API 33 emulator) and reinstalls a missing or older helper. The cache still skips the APK checksums.
• After an install, ensureAndroidImeHelper waits up to 5 s for ime list -a -s to list the service. adb install returns before the input method manager registers it, and ime enable/ime set then fail with "Unknown input method". This also hits first installs on main. A wait that runs out leaves the refusal to the existing read-back.

Closes #3407. 3 files: the two checks and tests.

Validation

Head 72ce59f: pnpm check:affected --run passed, run with AWS_REGION unset because cloud-connect-profile.test.ts reads the host's region. Reverting either change fails its new test.

Live on an Android 13 emulator (API 33, arm64, -gpu swiftshader_indirect), open com.android.settings, reading default_input_method after each open:

Test IME selected after	base 3d48bb9	head 72ce59f
reopen after adb uninstall (#3407's steps)	0/10	10/10
first open, helper freshly installed	16/20	20/20
reopen after loading a snapshot taken without the helper	0/10	10/10

Not run on a physical device or a remote adb provider.