- all user interface unrelated data is now kept in baresip service

allowing proper recovery in case Android kills other activities
- many other improvements and bug fixes

app/src/main/kotlin/com/tutpro/baresip/Contact.kt

@@ -1,3 +1,16 @@
 package com.tutpro.baresip
 
-class Contact(var name: String, var uri: String)
+import java.util.ArrayList
+
+class Contact(var name: String, var uri: String) {
+
+    companion object {
+
+        const val CONTACTS_SIZE = 100
+
+        fun contacts(): ArrayList<Contact> {
+            return BaresipService.contacts
+        }
+
+    }
+}