Explicitly add Cloneable interface to GlideOptions and GlideRequests.

It seems like this shouldn’t be necessary, but it fixes a PMD warning.

Fixes bumptech#2394.

Author: sjudd

annotation/compiler/src/main/java/com/bumptech/glide/annotation/compiler/RequestBuilderGenerator.java

@@ -165,6 +165,7 @@ TypeSpec generate(String generatedCodePackageName, @Nullable TypeSpec generatedO
         .addModifiers(Modifier.PUBLIC)
         .addTypeVariable(transcodeTypeName)
         .superclass(requestBuilderOfTranscodeType)
+        .addSuperinterface(Cloneable.class)
         .addMethods(generateConstructors())
         .addMethod(generateDownloadOnlyRequestMethod())
         .addMethods(generateGeneratedRequestOptionsEquivalents(generatedOptions))

annotation/compiler/src/main/java/com/bumptech/glide/annotation/compiler/RequestOptionsGenerator.java

@@ -138,6 +138,7 @@ public MethodSignature apply(MethodAndStaticVar f) {
         .addJavadoc(generateClassJavadoc(glideExtensionClassNames))
         .addModifiers(Modifier.FINAL)
         .addModifiers(Modifier.PUBLIC)
+        .addSuperinterface(Cloneable.class)
         .superclass(requestOptionsName);
 
     for (MethodAndStaticVar methodAndStaticVar : allMethodsAndStaticVars) {