Common: bms: modify Iavg parameter for low temperature enviroment

Bug: 26526717

Change-Id: Iaaf7a7709ce6fd7c06ab9f0569d7cb3592d1ed82
Reviewed-on: http://mcrd1-22-pc.corpnet.asus/code-review/master/204109


Reviewed-by: Ben_Chao <ben_chao@asus.com>
Tested-by: Ben_Chao <ben_chao@asus.com>
Reviewed-by: Chih-Wei Huang <cw_huang@asus.com>
Reviewed-on: http://mcrd1-22-pc.corpnet.asus/code-review/master/212422


Tested-by: Chih-Wei Huang <cw_huang@asus.com>