This enum defines LED priorities supported by the system (from lowest to highest priority):
LED_PRIORITY_BACKGROUND: long-lasting background indications
LED_PRIORITY_NORMAL: regular, typically short indications
LED_PRIORITY_IMPORTANT: important indications
LED_PRIORITY_CRITICAL: critically important indications
Internally, the system uses the same set of priorities for its own LED signaling. In a situation when both an application and the system use same priority for their active indications, system indication takes precedence. Refer to the LEDSignal Enum section for information about system signal priorities.