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/MasterClear.java

@@ -118,7 +118,8 @@ public class MasterClear extends OptionsMenuFragment
     private void showFinalConfirmation() {
         Bundle args = new Bundle();
         args.putBoolean(ERASE_EXTERNAL_EXTRA, mExternalStorage.isChecked());
-        ((SettingsActivity) getActivity()).startPreferencePanel(MasterClearConfirm.class.getName(),
+        ((SettingsActivity) getActivity()).startPreferencePanel(
+                this, MasterClearConfirm.class.getName(),
                 args, R.string.master_clear_confirm_title, null, null, 0);
     }