fix: add ConnectionExpress source file

Author: diogoqueiros

plugin.xml

@@ -25,6 +25,8 @@
             target-dir="src/com/tlantic/plugins/socket" />
         <source-file src="src/android/Connection.java"
             target-dir="src/com/tlantic/plugins/socket" />
+        <source-file src="src/android/ConnectionExpress.java"
+            target-dir="src/com/tlantic/plugins/socket" />
     </platform>
 
     <!-- ios -->

src/android/ConnectionExpress.java

@@ -1,6 +1,5 @@
 package com.tlantic.plugins.socket;
 
-import android.telecom.Call;
 import android.util.Base64;
 
 import java.net.Socket;