Integrate new notification UI with notifications coming from BLE

src/displayapp/screens/NotificationIcon.cpp

@@ -0,0 +1,8 @@
+#include "NotificationIcon.h"
+#include "Symbols.h"
+using namespace Pinetime::Applications::Screens;
+
+const char* NotificationIcon::GetIcon(bool newNotificationAvailable) {
+  if(newNotificationAvailable) return Symbols::info;
+  else return "";
+}