HID:correct mag axis config for External viewer

External viewer mag axis is different from ACCEL and
Gyro, we need change it to Android coordinate system.

Change-Id: I90b8427b3cbd176f5daea30e5ff01991ca146ae3
Signed-off-by: Kedi Xu <kedix@codeaurora.org>
Signed-off-by: Rohit Bandi <rohitbandi@codeaurora.org>