Abstract tracking and specify which target it came from

Split tracking out of the base target and from viewPageTarget

Primary reasons for this change:
 * Makes it possible to resolve an issue with tracking in mobile
 * Lets us reuse the viewPage save workflow tracking
 * Support existing and new targets with tracking
 * Simplification of target classes

Change-Id: I036e4f2129d929db0a3b9a4baa87c946a4b194a9
Merge "Abstract tracking and specify which target it came from"