Timing out: https://cirrus-ci.com/task/6220751272411136

This engine PR says the Pixel 4 is less available/is deprecated in Firebase Test Lab. flutter/engine#29239

Update the plugins tests:

          'model=walleye,version=26',
          'model=flame,version=29'

https://github.com/flutter/plugins/blob/5f1c83e3933e7bc993b011721c330c241fe9796a/script/tool/lib/src/firebase_test_lab_command.dart#L56-L57