Cross Reference: /system/bt/service/example/heart_rate

`Name`	`Date`	`Size`
Up to higher level directory
`constants.h`	06-Dec-2016	`1.5K`
`heart_rate_server.cpp`	06-Dec-2016	`15.5K`
`heart_rate_server.h`	06-Dec-2016	`5.6K`
`server_main.cpp`	06-Dec-2016	`5K`