Add more logs in RootTDAOrganizer

There is an issue that obtaining a display specified by
DisplayAreaInfo#displayId in onDisplayAreaAppeared
failed and caused an Exception in Shell and System UI
restarted. It is very odd that the info is directly from WMS
and the display should be initialized already.

This CL tries to add more logs to help debug the root cause.

Test: manual
Bug: 180818790
Change-Id: I0ea6387f80a2f19a985815419fae3602963c6c84