Use setColorFilter on post-21 ActionBars only

apps/app/ui-tests-app/action-bar/background.xml

@@ -8,6 +8,6 @@
     </ActionBar>
   </Page.actionBar>
   <StackLayout>
-    <Button text="go to cleared page" tap="navigate"/>
+    <Button text="go to cleared page" tap="navigate" style="background-color: green;"/>
   </StackLayout>
 </Page>

tns-core-modules/ui/styling/background.android.ts

@@ -39,7 +39,9 @@ export module ad {
     function isSetColorFilterOnlyWidget(nativeView: android.view.View): boolean {
         return ( 
             nativeView instanceof android.widget.Button || 
-            nativeView instanceof android.support.v7.widget.Toolbar
+            (nativeView instanceof android.support.v7.widget.Toolbar 
+            && getSDK() >= 21 // There is an issue with the DrawableContainer which was fixed for API version 21 and above: https://code.google.com/p/android/issues/detail?id=60183
+            )
         ); 
     }