Don't let everyone reach into NotificationData.Entry for its row

Test: atest SystemUITests
Change-Id: I0b4b66769afcf39c35800d293c22263e31790788
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhoneTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhoneTest.java
index 1070795..44deb10 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhoneTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhoneTest.java
@@ -97,7 +97,7 @@
     @Test
     public void testCanRemoveImmediately_notTopEntry() {
         NotificationData.Entry laterEntry = new NotificationData.Entry(createNewNotification(1));
-        laterEntry.row = mRow;
+        laterEntry.setRow(mRow);
         mHeadsUpManager.showNotification(mEntry);
         mHeadsUpManager.showNotification(laterEntry);