HidProfile: sync isPreferred() with HidHostService

HidHostService allow to connect when priority is PRIORITY_UNDEFINED.
HidProfile should return ture when priority is PRIORITY_UNDEFINED.
Otherwise, the "Input device" toggle in off state when HID device
connected.

Bug: 132456322
Test: manual
Change-Id: Id7bae694c57aec17e019d591c0a677e3cb64f845