tree 1d1b5d69469c89ecbc045693480ce65f00eba3ef
parent 358eab0ffffa2863d9fb86c3511c859ae5dc5666
author Fan Zhang <zhfan@google.com> 1487113355 -0800
committer Fan Zhang <zhfan@google.com> 1487207839 -0800

Log source with visibility change

- Add a method in VisibilityLoggerMixin to log visible event using
  LogMaker, which allows logging additional FIELD_CONTEXT field.
- In Utils.startFragment, add current page's metricsCategory as an extra
  to next page.
- In next page's onResume(), extract the previous page's metricsCategory
  and send it to VisibilityLoggerMixin.visible()
- Update all caller with additional paramters

Change-Id: I8e1f2597fa465b7d3aa16fa1d21c052a3219694a
Fix: 35359289
Test: RunSettingsRoboTests