add a helper function for getting contact sources synchronously

Author: tibbi

app/src/main/kotlin/com/simplemobiletools/contacts/helpers/ContactsHelper.kt

@@ -637,12 +637,16 @@ class ContactsHelper(val activity: BaseSimpleActivity) {
 
     fun getContactSources(callback: (ArrayList<ContactSource>) -> Unit) {
         Thread {
-            val sources = getDeviceContactSources()
-            sources.add(ContactSource(activity.getString(R.string.phone_storage_hidden), SMT_PRIVATE))
-            callback(ArrayList(sources))
+            callback(getContactSourcesSync())
         }.start()
     }
 
+    private fun getContactSourcesSync(): ArrayList<ContactSource> {
+        val sources = getDeviceContactSources()
+        sources.add(ContactSource(activity.getString(R.string.phone_storage_hidden), SMT_PRIVATE))
+        return ArrayList(sources)
+    }
+
     private fun getDeviceContactSources(): LinkedHashSet<ContactSource> {
         val sources = LinkedHashSet<ContactSource>()
         if (!activity.hasContactPermissions()) {