PCMark: Editing the screen orientation

Some devices have proved to have a natural orientation
that does not lend itself well to this workload. Therefore
I have edited the orientation lock to portrait instead of
natural.

wa/workloads/pcmark/uiauto/app/src/main/java/com/arm/wa/uiauto/pcmark/UiAutomation.java

@@ -47,7 +47,7 @@ public class UiAutomation extends BaseUiAutomation {
     @Test
     public void setup() throws Exception{
         dismissAndroidVersionPopup();
-        setScreenOrientation(ScreenOrientation.NATURAL);
+        setScreenOrientation(ScreenOrientation.PORTRAIT);
         loadBenchmarks();
         installBenchmark();
     }