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

tests/robotests/src/com/android/settings/applications/AppInfoWithHeaderTest.java

@@ -24,6 +24,7 @@ import android.content.pm.PackageManager;
 import android.support.v7.preference.PreferenceManager;
 import android.support.v7.preference.PreferenceScreen;
 
+import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.SettingsRobolectricTestRunner;
 import com.android.settings.TestConfig;
 import com.android.settings.testutils.FakeFeatureFactory;
@@ -57,18 +58,20 @@ public class AppInfoWithHeaderTest {
         FakeFeatureFactory.setupForTest(mContext);
 
         mFactory = (FakeFeatureFactory) FakeFeatureFactory.getFactory(mContext);
-
+        when(mFactory.metricsFeatureProvider.getMetricsCategory(any(Object.class)))
+                .thenReturn(MetricsProto.MetricsEvent.SETTINGS_APP_NOTIF_CATEGORY);
         mAppInfoWithHeader = new TestFragment();
     }
 
     @Test
     public void testAppHeaderIsAdded() {
+        final AppHeaderController appHeaderController = new AppHeaderController(
+                ShadowApplication.getInstance().getApplicationContext(),
+                mAppInfoWithHeader,
+                null);
         when(mFactory.dashboardFeatureProvider.isEnabled()).thenReturn(true);
         when(mFactory.applicationFeatureProvider.newAppHeaderController(mAppInfoWithHeader, null))
-                .thenReturn(new AppHeaderController(
-                        ShadowApplication.getInstance().getApplicationContext(),
-                        mAppInfoWithHeader,
-                        null));
+                .thenReturn(appHeaderController);
         mAppInfoWithHeader.onActivityCreated(null);
 
         verify(mAppInfoWithHeader.mScreen).addPreference(any(LayoutPreference.class));