[Bugfix][API-1621][audio] add api to set  mic volume and zk
default mic volume is set to 1-modify set uci error

       Affected branch: unknown
       Affected module: unknown
       Is it affected on both ZXIC and MTK: mtk
       Self-test: Yes
       Doc Update: No

Change-Id: I8a2ea1d359a386e6265cdb07bf3fee17744e0fea
1 file changed