Optional manifest icons

app/src/main/java/eu/faircode/email/ContactInfo.java

@@ -559,10 +559,11 @@ public class ContactInfo {
                     try {
                         String json = Helper.readStream(m.getInputStream());
                         JSONObject jroot = new JSONObject(json);
+                        if (jroot.has("icons")) {
                             JSONArray jicons = jroot.getJSONArray("icons");
                             for (int i = 0; i < jicons.length(); i++) {
                                 JSONObject jicon = jicons.getJSONObject(i);
-                            String src = jicon.getString("src");
+                                String src = jicon.optString("src");
                                 String sizes = jicon.optString("sizes", "");
                                 String type = jicon.optString("type", "");
                                 if (!TextUtils.isEmpty(src)) {
@@ -573,6 +574,7 @@ public class ContactInfo {
                                     imgs.add(img);
                                 }
                             }
+                        }
                     } finally {
                         m.disconnect();
                     }