Follow `core-libart-for-host` visibility change.

This mirrors the visibility change already merged at
https://android-review.git.corp.google.com/c/platform/libcore/+/2907436

Bug: 319647875
Change-Id: I98e5724fa6baf8303e8e7cf007ca40166e6b5aa0
Test: atest SystemUiRavenTests
diff --git a/go/current/test-exports/Android.bp b/go/current/test-exports/Android.bp
index 532314f..1660fb3 100644
--- a/go/current/test-exports/Android.bp
+++ b/go/current/test-exports/Android.bp
@@ -151,6 +151,7 @@
         "//art/build/sdk",
         "//external/robolectric",
         "//external/robolectric-shadows",
+        "//frameworks/base",
         "//frameworks/layoutlib",
         "//libcore",
         "//prebuilts:__subpackages__",