Format header files

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

src/components/heartrate/HeartRateController.h

@@ -7,9 +7,11 @@ namespace Pinetime {
   namespace Applications {
     class HeartRateTask;
   }
+
   namespace System {
     class SystemTask;
   }
+
   namespace Controllers {
     class HeartRateController {
     public:
@@ -21,9 +23,11 @@ namespace Pinetime {
       void Update(States newState, uint8_t heartRate);
 
       void SetHeartRateTask(Applications::HeartRateTask* task);
+
       States State() const {
         return state;
       }
+
       uint8_t HeartRate() const {
         return heartRate;
       }