Update uniqueId association methods

Change from associating via name to associating via physical input port.
This is more robust as there is less likely to be a chance of collision,
as well as less likely to have problems as the userspace language changes
(and therefore the user-visible name should also change).

Bug: 202273865
Test: atest FrameworksServicesTests:com.android.server.companion.virtual

Change-Id: Ieae349e20f66df1490351c85a99d2efa5910d08b