Use AudioDeviceInfo.getPort().name() instead of getProductName

getProductName replaces the absence of a name with the name of
the device (example: Pixel 8). In that case we want to derive
a name from the device type ourselves.

Bug: 305199571
Test: atest MediaRouterServiceTests # Added in same topic
Change-Id: Ifc6b75d33af004f35f219aa73d91aadeb2444586