Initiate monkey directly from stream. On some devices monkey crashes if we just connect and disconnect.

lib/util/devutil.js

@@ -46,8 +46,8 @@ devutil.waitForPort = function(adb, serial, port) {
   }
   return adb.openTcpAsync(serial, port)
     .then(function(conn) {
-      conn.end()
-      return port
+      conn.port = port
+      return conn
     })
     .catch(closedError, function(err) {
       return Promise.delay(100)