Add tron logging for phone orientation

Knowing the orientation (landscape vs. portrait) of the phone is a
useful aspect of to know when interpreting user phone interaction. Among
the usecases is analysis of share behavior.

Bug: 122511750
Test: Added unit test in DisplayContentTests.java
Change-Id: Ibf1e2040e2eb082580e1c4a65cf242870460f1ef
3 files changed