Switch Fuchsia testing to emu-recommended.

There used to be an emu-large, but this was removed and our request for emu-large (8GB) is now silently replaced with emu-extra-large (28GB). After our switch from n4d-standard-8 (32GB) to n4d-highcpu-8 (16GB) machines, the bot started timing out. Switch the request to emu-recommended (8GB).

Change-Id: I181f2984082e72a0b49c280a9474c05a667578e3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/537821
Reviewed-by: Zijie He <zijiehe@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>

pkg/test_runner/lib/src/fuchsia.dart

diff --git a/pkg/test_runner/lib/src/fuchsia.dart b/pkg/test_runner/lib/src/fuchsia.dart
index 52943b6..9b03810 100644
--- a/pkg/test_runner/lib/src/fuchsia.dart
+++ b/pkg/test_runner/lib/src/fuchsia.dart
@@ -27,7 +27,7 @@
     var args = <String>[
       "./build/fuchsia/test_env.py",
       "--out-dir=$buildDir/gen/dart_test",
-      "--device-spec=$arch-emu-large",
+      "--device-spec=$arch-emu-recommended",
       "--packages=dart_test.far",
       "--logs-dir=${daemonIsolateDir!.path}",
     ];