Rename member function

Rename member function

[Version] 1.0.8-0
[Issue type] update

https://review.tizen.org/gerrit/#/c/platform/core/multimedia/dfs-adaptation/+/279919 Rename member function

https://wiki.tizen.org/Native_Platform_Coding_Idiom_and_Style_Guide
[M05] The name should start with lowercase letters, Camel notation. Keep the style 'verb' + 'noun‘.
 Member functions
o It should starts with a lowercase letter and have a uppercase letter for each new word. No underscores

Change-Id: I8ac31ce5291c7efbc514b6e7a76bb910f0e46f8f
Signed-off-by: Tae-Young Chung <ty83.chung@samsung.com>