audio: fix string leakage in out_get_parameters()

out_get_parameters() was calling strdup() on the string
returned by str_parms_to_str() before returning it
to the caller. This creates a new string which is never freed
as str_parms_to_str() already allocates a new string.

Change-Id: I4bcc4aa17ab55e830d7a0569151f717422f6459b
1 file changed