Make DefaultGenerationContext(GeneratedClasses,...) package private

The DefaultGenerationContext constructor which accepts an instance of
GeneratedClasses is now package private since GeneratedClasses can only
be created within the `org.springframework.aot.generate` package.

Author: sbrannen

spring-core/src/main/java/org/springframework/aot/generate/DefaultGenerationContext.java

@@ -63,7 +63,7 @@ public DefaultGenerationContext(ClassNameGenerator classNameGenerator, Generated
 	 * @param generatedFiles the generated files
 	 * @param runtimeHints the runtime hints
 	 */
-	public DefaultGenerationContext(GeneratedClasses generatedClasses,
+	DefaultGenerationContext(GeneratedClasses generatedClasses,
 			GeneratedFiles generatedFiles, RuntimeHints runtimeHints) {
 		Assert.notNull(generatedClasses, "'generatedClasses' must not be null");
 		Assert.notNull(generatedFiles, "'generatedFiles' must not be null");