Revert "Use UiEvent for constants inside StatsLogManager"

This reverts commit 6b99a7d3977e62c2555e8a2decbd2769d92179a1.

Reason for revert: Launcher3 AOSP cannot link to uieventloggerlib because it's private API

Change-Id: Id652b8a4cba54b97d1d8b8644c2939903cc0e88a
6 files changed