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/accounts/AccountSyncPreferenceController.java

@@ -24,6 +24,7 @@ import android.os.Bundle;
 import android.os.UserHandle;
 import android.support.v7.preference.Preference;
 
+import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.Utils;
 import com.android.settings.core.PreferenceController;
 
@@ -53,7 +54,7 @@ public class AccountSyncPreferenceController extends PreferenceController {
         args.putParcelable(AccountSyncSettings.ACCOUNT_KEY, mAccount);
         args.putParcelable(EXTRA_USER, mUserHandle);
         Utils.startWithFragment(mContext, AccountSyncSettings.class.getName(), args, null, 0, -1,
-            mAccount.name);
+            mAccount.name, MetricsProto.MetricsEvent.ACCOUNT);
         return true;
     }