Remove USB host stuff from Kitchen Sink

This code haven't been changed for years and it is deprecated. We have
most of this logic in car-usb-handler. Also it doesn't work and Kitchen
Sink crashes when you go to 'car service settings' tab

Bug:127863901
Test: m -j ; verify Kitchen sink is not crashing and 'car service
settings' tab has been removed

Change-Id: I1b839fedcc24f22fb978531e800457f449d9bf17
13 files changed