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

src/com/android/settings/applications/ProcessStatsBase.java

@@ -139,7 +139,7 @@ public abstract class ProcessStatsBase extends SettingsPreferenceFragment
                 memInfo.usedWeight * memInfo.weightToRam);
         args.putDouble(ProcessStatsDetail.EXTRA_TOTAL_SCALE, memInfo.totalScale);
         args.putBoolean(AppHeader.EXTRA_HIDE_INFO_BUTTON, !includeAppInfo);
-        activity.startPreferencePanel(ProcessStatsDetail.class.getName(), args,
+        activity.startPreferencePanel(null, ProcessStatsDetail.class.getName(), args,
                 R.string.memory_usage, null, null, 0);
     }
 }