change version string

Author: AchoArnold

android/app/src/main/res/values/strings.xml

@@ -15,5 +15,5 @@
     <string name="send_heartbeat">Send Heartbeat</string>
     <string name="server_url">Server URL</string>
     <string name="default_server_url">https://api.httpsms.com</string>
-    <string name="app_version">Version - %s</string>
+    <string name="app_version">httpsms.com - %s</string>
 </resources>