Camera: fix spinner text invisible issue

Test: verify spinner text is visible again
Bug: 116175415
Change-Id: If12b6a139862dd6d09992ab3aa11b3f535be3070
diff --git a/apps/CtsVerifier/res/layout/camera_fov_calibration_photo_capture.xml b/apps/CtsVerifier/res/layout/camera_fov_calibration_photo_capture.xml
index 7f8efa0..c142b15 100644
--- a/apps/CtsVerifier/res/layout/camera_fov_calibration_photo_capture.xml
+++ b/apps/CtsVerifier/res/layout/camera_fov_calibration_photo_capture.xml
@@ -49,7 +49,6 @@
             android:layout_alignParentBottom="true"
             android:layout_alignParentLeft="true"
             android:padding="10sp"
-            android:popupBackground="#ffffff"
             android:textSize="18sp" />
     </RelativeLayout>