Change Stream to Print (#1307)

* Change Stream to Print 1/2

Update WifiManager to use base class Print instead of Stream.

I debug into a custom buffer, and that buffer implements Print, but not Stream.

* Change Stream to Print 2/2

Update WifiManager to use base class Print instead of Stream.

I debug into a custom buffer, and that buffer implements Print, but not Stream.

WiFiManager.cpp

@@ -199,7 +199,7 @@ int WiFiManager::getParametersCount() {
 **/
 
 // constructors
-WiFiManager::WiFiManager(Stream& consolePort):_debugPort(consolePort){
+WiFiManager::WiFiManager(Print& consolePort):_debugPort(consolePort){
   WiFiManagerInit();
 }