Implement Serializable for DebugImage.

Author: bretthoerner

sentry/src/main/java/io/sentry/event/interfaces/DebugMetaInterface.java

@@ -1,5 +1,6 @@
 package io.sentry.event.interfaces;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 
 /**
@@ -45,7 +46,7 @@ public String toString() {
     /**
      * Object that represents a single debug image.
      */
-    public static class DebugImage {
+    public static class DebugImage implements Serializable {
         private static final String DEFAULT_TYPE = "proguard";
         private final String uuid;
         private final String type;