Defines all the error codes that Notification API returns.
Values:
SUCCESS -Success.
DEVICE_NOT_CONNECTED -Notification device is not connected.
DEVICE_INVALID -Notification device is invalid.
DEVICE_NOT_ENABLED -Notification device is not enabled.
DEVICE_ALREADY_ENABLED -Notification device is already enabled.
FAILURE -Failure.
INVALID_VALUE -The value specified is invalid.
FEATURE_NOT_SUPPORTED -Feature not supported.
UNDEFINED -Error code not defined.