Remove tuner icon from settings button

This removes a two-way call to system_server in the main thread. The
only way to enable the tuner right now is through adb and it's largely
not used, so removing this indicator is not a big loss.

Fixes: 207257090
Test: atest FooterActionsControllerTest
Change-Id: If03c697f97a6c155122be98e369da66d2617069b