Expose robolectric utils as a filegroup

Bug: 355268748
Test: N/a
Flag: TEST_ONLY
Change-Id: I2ec522d33c8c48e7468f96ca1b168e958707a284
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index a17076b..f7d9518 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -640,6 +640,15 @@
 }
 
 filegroup {
+    name: "SystemUI-robotest-utils",
+    srcs: [
+        "tests/robolectric/src/com/android/systemui/testutils/**/*.kt",
+        "tests/robolectric/src/com/android/systemui/testutils/**/*.java",
+    ],
+    path: "tests/robolectric/src/com/android/systemui/testutils",
+}
+
+filegroup {
     name: "SystemUI-tests-multivalent",
     srcs: [
         "multivalentTests/src/**/*.kt",