fix: override accountConnectionStatusProvider in E2E test to prevent spinner deadlock

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>

integration_test/app_e2e_test.dart

@@ -145,6 +145,10 @@ void main() {
           // Stalwart dev server has no TLS — use plaintext IMAP/SMTP throughout.
           imapConnectProvider.overrideWithValue(_connectImapPlaintext),
           smtpConnectProvider.overrideWithValue(_connectSmtpPlaintext),
+          // Skip the real IMAP connection-check so _AccountTile never shows a
+          // CircularProgressIndicator — pumpAndSettle() cannot settle while a
+          // continuously-running animation is in the tree.
+          accountConnectionStatusProvider.overrideWith((ref, _) async {}),
         ],
       );
       await tester.pumpAndSettle();