bug: 8393568
Change-Id: Ie5edf44a3627aca9416145aff56bf05bbf2a05f3

multi-project commit with I1212da392ecda0ad78962da68941870b5a651eee

Change-Id: Ie74af59d4e45bf954723fee9dcf350a36468c381

The method in LogUnit for publishing a LogStatement to a JsonWriter doesn't
depend on anything in the LogUnit.

multi-project commit with Id1d6ff4851148bba0e6b5a1ec6eec2b842d9c707

Change-Id: I323cec239d6ea1cee602c2ecf9b13713791e9283

Change-Id: Iae04115921aaf6bbc3c6ad6e7d2d0e7401af41f8

- Add support for replaying log files to the ResearchLogger.  This will let
  users preview data that they choose to upload.
- When the user explicitly requests that the system record their action, it
  will record everything up to, and including, the motion involved in shutting
  off the recording.  This change also removes the stop-recording motion
  commands.

Change-Id: Ib1df383bbf1881512cb111fab9f6749c25e436ba