Do not show Usb dialog for USB peripherals.

This CL prevents the USB Dialog to show for peripherals such as
keyboard, mouse, flash drives etc. Usb Dialog is redundant in these
cases as the Type-C stack is expected to manage power automatically
as these devices are most likely SNK devices.

Bug: 36141499
Test: Manually tested that USB dialog doesnt show up when
a keyboard or mouse is connected.

Change-Id: I3ee45f137817425bf9acd675b044a97d1cb91d7d