Comment 4 for bug 1353560

Sorry, I mixed it up with a bit with the normal handset use, not speakerphone. So it is related to proximity in that if during a call, it should only turn off completely on proximity, otherwise should stay on but dim.

This can be handled by a powerd request by the dialer app I believe. Same as `powerd-cli display on` does. Not sure if the switch to u-s-c handling brightness brought over the right behavior of dimming but not powering off?