add get charing current api for discrete_charger_class
factory tcmd will use this api
Change-Id: I1a6011fcf7b936329e6ae1b7787b6e86078b8915
Signed-off-by: liuyc20 <liuyc20@lenovo.com>
Reviewed-on: https://gerrit.mot.com/2090448
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Haijian Ma <mahj8@motorola.com>
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key