Add mac builders to try configurations. (#65578)

dev/try_builders.json

@@ -72,6 +72,20 @@
          "enabled":true,
          "run_if":["examples/hello_world/**" ,"dev/**", "packages/flutter/**", "packages/flutter_test/**", "packages/flutter_tools/lib/src/test/**", "packages/flutter_web_plugins/**", "bin/**"]
       },
+      {
+         "name":"Mac framework_tests",
+         "repo":"flutter",
+         "task_name":"mac_framework_tests",
+         "enabled":true,
+         "run_if":["dev/**", "packages/flutter/**", "packages/flutter_goldens/**", "packages/flutter_goldens_client/**", "packages/flutter_test/**", "packages/flutter_tools/lib/src/test/**", "bin/**"]
+      },
+      {
+         "name":"Mac tool_tests",
+         "repo":"flutter",
+         "task_name":"mac_tool_tests",
+         "enabled":true,
+         "run_if":["dev/**", "packages/flutter_tools/**", "bin/**"]
+      },
       {
          "name": "Windows build_tests",
          "repo": "flutter",