Small address JSON fixes

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

@@ -1635,7 +1635,8 @@ public abstract class DB extends RoomDatabase {
 
         @TypeConverter
         public static Address[] decodeAddresses(String json) {
-            if (json == null)
+            try {
+                if (TextUtils.isEmpty(json))
                     return null;
                 else if (json.startsWith("[[")) {
                     // [[{"address":"...","personal":"..."}],[{... ...}]]
@@ -1649,6 +1650,10 @@ public abstract class DB extends RoomDatabase {
                     // [{"address":"...","personal":"..."}]
                     return new Address[]{InternetAddressJson.from(json.substring(2, json.length() - 2))};
                 }
+            } catch (Throwable ex) {
+                Log.e(ex);
+                return null;
+            }
         }
     }
 }

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

@@ -106,7 +106,7 @@ public class InternetAddressJson extends InternetAddress {
         if (this.json != null) {
             try {
                 JSONObject jaddress = new JSONObject("{" + this.json + "}");
-                String address = jaddress.getString("address");
+                String address = jaddress.optString("address");
                 String personal = jaddress.optString("personal");
                 if (!TextUtils.isEmpty(address))
                     super.setAddress(address);