SearchFeatureProvider's context field is removed

SearchFeatureProvider was holding on to a context and
outlived the SettingsActivity, thus leaking the activity.
The context was passed into most methods, and thus it
makes more sense to pass it in to every method.

Bug: 33677967
Test: Run MakeSettingsRoboTests
Change-Id: Ia82f30e7e0b83587b4baeef28e81da6b8e4303fe

src/com/android/settings/search2/SearchFragment.java

@@ -66,7 +66,7 @@ public class SearchFragment extends InstrumentedFragment implements
     public void onAttach(Context context) {
         super.onAttach(context);
         mSearchFeatureProvider = FeatureFactory.getFactory(context)
-                .getSearchFeatureProvider(context);
+                .getSearchFeatureProvider();
     }
 
     @Override