Fix dependents task.

Author: vkryachko

buildSrc/src/main/groovy/com/google/firebase/gradle/plugins/ci/ContinuousIntegrationPlugin.java

@@ -19,6 +19,7 @@
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
+import org.gradle.api.GradleException;
 import org.gradle.api.Plugin;
 import org.gradle.api.Project;
 import org.gradle.api.Task;
@@ -39,7 +40,7 @@ public void apply(Project project) {
           Task connectedCheckDependents = sub.task("connectedCheckDependents");
           Task deviceCheckDependents = sub.task("deviceCheckDependents");
 
-          project
+          sub
               .getConfigurations()
               .all(
                   cfg -> {