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/ShortcutPreference.java

@@ -17,6 +17,8 @@ package com.android.settings.applications;
 import android.content.Context;
 import android.os.Bundle;
 import android.support.v7.preference.Preference;
+
+import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.SettingsActivity;
 import com.android.settings.Utils;
 
@@ -42,6 +44,6 @@ public class ShortcutPreference extends Preference {
         Bundle bundle = new Bundle();
         bundle.putString(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY, mPrefKey);
         Utils.startWithFragment(getContext(), mTarget.getName(), bundle, null, 0,
-                mTitle, null);
+                mTitle, null, MetricsProto.MetricsEvent.VIEW_UNKNOWN);
     }
 }