Omit using ctor of PreferenceViewHolder in tests.

See the topic for related change in the support lib.

Bug: b/33774880
Test: N/A
Change-Id: I3514821db649e26068f151bd69c687faab5ae222

tests/robotests/src/com/android/settings/SummaryPreferenceTest.java

@@ -48,7 +48,7 @@ public class SummaryPreferenceTest {
         final View view = inflater.inflate(mPreference.getLayoutResource(),
                 new LinearLayout(mContext), false);
 
-        mHolder = new PreferenceViewHolder(view);
+        mHolder = PreferenceViewHolder.createInstanceForTests(view);
     }
 
     @Test