[devicelab] de-flake iOS launch (#68790)

* [devicelab] de-flake iOS launch

packages/flutter_tools/lib/src/ios/devices.dart

diff --git a/packages/flutter_tools/lib/src/ios/devices.dart b/packages/flutter_tools/lib/src/ios/devices.dart
index d67a70b..9598471 100644
--- a/packages/flutter_tools/lib/src/ios/devices.dart
+++ b/packages/flutter_tools/lib/src/ios/devices.dart
@@ -422,7 +422,7 @@
           deviceLogReader,
           portForwarder: portForwarder,
           throttleDuration: fallbackPollingDelay,
-          throttleTimeout: fallbackThrottleTimeout ?? const Duration(seconds: 5),
+          throttleTimeout: fallbackThrottleTimeout ?? const Duration(minutes: 5),
           hostPort: debuggingOptions.hostVmServicePort,
           devicePort: debuggingOptions.deviceVmServicePort,
           ipv6: ipv6,