Implement SAR power backoff feature [3/3]

Implement the feature for Antenna SAR testing.

Issue: FP3-A11#231
Change-Id: I69618451b49d20bcc4836056c611eb4e76e81774
Depends-On: Ic2ae2f53874d0a9df85a428ae739d4ba01dfe6eb
1 file changed