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: I6959d2829f7ff9ba609f9e4e3cb7b52e0f555c3f
4 files changed