[VD] Check file protocol using file format

[VD] Check file protocol using file format

In current logic, WRT use url format to check file protocol, if
file path including special character(ex. blank/?/+/...), it will
be converted to special code(blank-> %20, #->%23,...), so we should
use file format to check file exist or not.

ex.
/opt/media/USBDriveA1/bts/1/Fulfill%20mentGustav_Klimt.jpg we should
change it to file format
/opt/media/USBDriveA1/bts/1/Fulfill mentGustav_Klimt.jpg
otherwise, this image can not be shown.

Change-Id: If159c68d74f12d4a68b8cacf182e3c4f75f4ad3b
Signed-off-by: liwei <wei90727.li@samsung.com>