Adding public API to expose DisplayInfo.deviceProductInfo

Changing class DeviceProductInfo to public class with hidden ctor to expose via
Display#getDeviceProductInfo. Removing the relative address and changing
to connectionToSinkType.

Bug: 179775994
Test: atest CtsDisplayTestCases
Change-Id: I92f32461a054244b75dc4d5ddfd30e9a7968f3dd
6 files changed