Add leadDisplayAddress to display-layout-config

- If leadDisplayAddress is not specified in display-layout-config XML,
  no lead display is set.
- This CL will set a lead display according to leadDisplayAddress in
  display-layout-config.

Bug: 274391981
Test: atest DeviceStateToLayoutmapTest
Change-Id: I6f9272ff41429f64c8e55984182c55a9ccebd9f7
6 files changed