Add `PowerMetercontrollerBase` class.

The RF controller of the power meter should be able to measure all
kinds of RF type. Therefore we set the dafault RF type "ALL" that
accepts every RF type.

BUG=chromium:681734
TEST=make test

Change-Id: I20578bf285fb2b21968c477ff910c7a0e3e91968
Reviewed-on: https://chromium-review.googlesource.com/453580
Commit-Ready: Chih-Yu Huang <akahuang@chromium.org>
Tested-by: Chih-Yu Huang <akahuang@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Wei-Han Chen <stimim@chromium.org>
4 files changed