there is obvious noise can be heared when heaset plug in. if we enable micbias when the headset has not been inserted totally. the noise can be transfered to HPHL/HPHR Propagated from: (CR) Change-Id: I9afc1cb0c7a5bad1381ac448774131d4b56a645c Signed-off-by: huangys <huangys@motorola.com> Reviewed-on: https://gerrit.mot.com/1216722 SME-Granted: SME Approvals Granted SLTApproved: Slta Waiver Tested-by: Jira Key Reviewed-by: Guobin Zhang <zhanggb@motorola.com> Submit-Approved: Jira Key