CircularProgressIndicator in _AccountTile (from accountConnectionStatusProvider)
runs continuously and prevents pumpAndSettle() from ever settling on Android,
causing frame-pump storms that drop the StreamBuilder data state and make
tap(aliceTile) find 0 widgets.
Overriding the provider to return immediately means no spinner ever enters the
tree, so pumpUntil() can use pumpAndSettle() cleanly again.
Also adds task run-android (boots sharedinbox_test AVD and runs flutter run).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
