[charger] Debounce charger connection info. Fixes: JB#24913

Stop sending signals the whole time when the charger is connected. As
we can get lots of spurious signals from the kernel, just like with the
regular cable connection.

Signed-off-by: Philippe De Swert <philippe.deswert@jollamobile.com>

src/usb_moded.c

@@ -192,16 +192,23 @@ if(!get_usb_connection_state())
  */
 void set_charger_connected(gboolean state)
 {
+  /* check if charger is already connected
+     to avoid spamming dbus */
+  if(current_mode.connected)
+                return;
+
   if(state)
   {
     usb_moded_send_signal(CHARGER_CONNECTED);
     set_usb_mode(MODE_CHARGER);
+    current_mode.connected = TRUE;
   }
   else
   {
     current_mode.connected = FALSE;
     usb_moded_send_signal(CHARGER_DISCONNECTED);
     set_usb_mode(MODE_UNDEFINED);
+    current_mode.connected = FALSE;
   }
 }