WIP Refactor ble advertising

Refactor ble advertising based on ble standards and conventions.
Changes are based on the bleprph example code, bluetooth docs, and nimble docs.

src/systemtask/SystemTask.cpp

@@ -120,7 +120,6 @@ void SystemTask::Work() {
   fs.Init();
 
   nimbleController.Init();
-  nimbleController.StartAdvertising();
   lcd.Init();
 
   twiMaster.Init();
@@ -226,7 +225,6 @@ void SystemTask::Work() {
             touchPanel.Wakeup();
           }
 
-          nimbleController.StartAdvertising();
           xTimerStart(dimTimer, 0);
           spiNorFlash.Wakeup();
           lcd.Wakeup();