refactor: OpenRewrite best practices

Use this link to re-run the recipe: https://app.moderne.io/recipes/org.openrewrite.recipes.OpenRewriteBestPractices?organizationId=T3BlblJld3JpdGU%3D

Co-authored-by: Moderne <team@moderne.io>

Author: timtebeek

plugin/src/main/java/org/openrewrite/gradle/DelegatingProjectParser.java

@@ -181,8 +181,7 @@ private ClassLoader getPluginClassLoader(Project project) {
         return pluginClassLoader;
     }
 
-    @Nullable
-    private ClassLoader getAndroidPluginClassLoader(Project project) {
+    private @Nullable ClassLoader getAndroidPluginClassLoader(Project project) {
         List<String> pluginIds = Arrays.asList(
                 "com.android.application",
                 "com.android.library",

plugin/src/main/java/org/openrewrite/gradle/RewriteExtension.java

@@ -94,8 +94,7 @@ public void setCheckstyleConfigFile(File configFile) {
      * Will prefer to return an explicitly configured checkstyle configuration file location.
      * If none has been specified, will attempt to auto-detect an appropriate file.
      */
-    @Nullable
-    public File getCheckstyleConfigFile() {
+    public @Nullable File getCheckstyleConfigFile() {
         if (checkstyleConfigFile == null && checkstyleConfigProvider != null) {
             try {
                 return checkstyleConfigProvider.get();