Add android.view.DisplayAddress

This CL augments DisplayInfo#address from String to an instance of
either DisplayAddress.Physical or DisplayAddress.Network. This can
be used to obtain the stable port and model for physical displays.

It also wires up DisplayViewport#physicalPort for use by InputFlinger.

Bug: 116025192
Test: dumpsys display
Change-Id: I2928b8b325b992b949b99a7d9175512f7930a54f