Format header files

In my PR updating clang-format, I forgot to also format the headers.

src/components/battery/BatteryController.h

@@ -17,6 +17,7 @@ namespace Pinetime {
       uint8_t PercentRemaining() const {
         return percentRemaining;
       }
+
       bool BatteryIsLow() const {
         return percentRemaining <= lowBatteryThreshold;
       }