Examples: add Cellular support

Author: pennam

.github/workflows/compile-examples.yml

@@ -34,6 +34,7 @@ jobs:
         - name: MKRGSM
         - name: MKRNB
         - name: MKRWAN
+        - name: Arduino_Cellular
       ARDUINOCORE_MBED_STAGING_PATH: extras/ArduinoCore-mbed
       ARDUINOCORE_API_STAGING_PATH: extras/ArduinoCore-API
       SKETCHES_REPORTS_PATH: sketches-reports

examples/ConnectionHandlerDemo/ConnectionHandlerDemo.ino

@@ -43,6 +43,8 @@ NBConnectionHandler conMan(SECRET_PIN);
 LoRaConnectionHandler conMan(SECRET_APP_EUI, SECRET_APP_KEY);
 #elif defined(BOARD_HAS_CATM1_NBIOT)
 CatM1ConnectionHandler conMan(SECRET_APN, SECRET_PIN, SECRET_GSM_USER, SECRET_GSM_PASS);
+#elif defined(BOARD_HAS_CELLULAR)
+CellularConnectionHandler conMan(SECRET_PIN, SECRET_APN, SECRET_GSM_USER, SECRET_GSM_PASS);
 #endif
 
 void setup() {