Added feature for surveys provider to Settings

It is now possible to create and show surveys to a user
asking them for feedback within the Settings app.

Test: JUnitTests
Bug: 27823357
Change-Id: I824899045f6ce30e5b6f46d20888da673114f658

src/com/android/settings/overlay/FeatureFactory.java

@@ -83,6 +83,8 @@ public abstract class FeatureFactory {
 
     public abstract SearchFeatureProvider getSearchFeatureProvider(Context context);
 
+    public abstract SurveyFeatureProvider getSurveyFeatureProvider(Context context);
+
     public static final class FactoryNotFoundException extends RuntimeException {
         public FactoryNotFoundException(Throwable throwable) {
             super("Unable to create factory. Did you misconfigure Proguard?", throwable);