Use hal interface

Use hal interface

hal interfaces were added. Besides, structure and enum names were changed
for better readability. In case of enum, audio_return_t is changed to
audio_return_'e', and device_info_t is changed to device_info_'s'.

[Version] 0.1.9
[Issue Type] None

Change-Id: I88005d26198d0453d07d08059f58e4cdf2206cb3
Signed-off-by: Jaechul Lee <jcsing.lee@samsung.com>