Notify battery level every 10 minutes when connected to a BLE host.

Refactor battery percent : only use uint8_t to store the battery % remaining.

src/displayapp/screens/WatchFaceAnalog.cpp

@@ -165,7 +165,6 @@ void WatchFaceAnalog::UpdateClock() {
 }
 
 bool WatchFaceAnalog::Refresh() {
-
   batteryPercentRemaining = batteryController.PercentRemaining();
   if (batteryPercentRemaining.IsUpdated()) {
     auto batteryPercent = batteryPercentRemaining.Get();