ResearchLogger log RichInputConnection

Move many ResearchLogger data collection points to RichInputConnection.
By collecting data here, developers do not have to remember to keep the
ResearchLog consistent with calls to the RichInputConnection.

In addition, some unnecessary log points were removed, and the ResearchLogger
is now independent of LatinImeLogger.

multi-project change with I05496cfd762e9a41c42c50099143f1efc0a3d8a2

Bug: 6188932
Change-Id: I424abb2e437901262a9620255493916b7c3ff74b