🐮 Add dummy junit targets so that GYP & GN have the same targets

components/BUILD.gn

Index: components/BUILD.gn
diff --git a/components/BUILD.gn b/components/BUILD.gn
index 636cecf14d7868148b3fb68c8a8c6230bd78ae2b..5ec73c0d42685fed53e511c722bf49ddf17b2e18 100644
--- a/components/BUILD.gn
+++ b/components/BUILD.gn
@@ -352,6 +352,12 @@ if (is_android) {
     resource_dirs = [ "//components/test/android/browsertests_apk/res" ]
     custom_package = "org.chromium.components_browsertests_apk"
   }
+
+  # GYP: //components/components_tests.gyp:components_junit_tests
+  # TODO(GYP): Delete this target once recipes no longer require it.
+  junit_binary("components_junit_tests") {
+    java_files = [ "//testing/android/junit/DummyTest.java" ]
+  }
 }
 
 if (!is_ios) {