Import surfaceflinger tests into renderengine's TEST_MAPPING

RenderEngine may be used for some surfaceflinger tests, so changes in
RenderEngine should trigger those tests.

Bug: 231394619
Test: none
Change-Id: I23878a68acfb6fd206559e89caae0a9ec9a49e95
diff --git a/libs/renderengine/TEST_MAPPING b/libs/renderengine/TEST_MAPPING
index 995dba1..db00118 100644
--- a/libs/renderengine/TEST_MAPPING
+++ b/libs/renderengine/TEST_MAPPING
@@ -3,5 +3,11 @@
     {
       "name": "librenderengine_test"
     }
+  ],
+
+  "imports": [
+    {
+      "path": "frameworks/native/services/surfaceflinger"
+    }
   ]
 }