Integrating ColorContrast in Picker

This CL aims at adding changes for integrating ColorContrast
functionality in WallpaperPicker App.

Bug: b/326108993
Test: Tested by building and installing picker on local and checking if
option appears or not, and testing dark/light theme
Flag: N/A

Change-Id: I8a9ec55d4aef621d2ea74be5373fc5137aa49b3b
diff --git a/tests/robotests/Android.bp b/tests/robotests/Android.bp
index 4fecaef..1377e22 100644
--- a/tests/robotests/Android.bp
+++ b/tests/robotests/Android.bp
@@ -27,6 +27,8 @@
         "truth",
         "SystemUICustomizationTestUtils",
         "ThemePickerApplicationLib",
+        "mockito-robolectric-prebuilt",
+        "mockito-kotlin2",
     ],
 
     libs: [