Enable hwui_unit_tests in presubmit for libs/hwui

Test: presubmits
Bug: 257123741
Change-Id: I4a5f754875936b757c6d239f9d1a087386a4087e
diff --git a/libs/hwui/TEST_MAPPING b/libs/hwui/TEST_MAPPING
index b1719a9..03682e8 100644
--- a/libs/hwui/TEST_MAPPING
+++ b/libs/hwui/TEST_MAPPING
@@ -5,6 +5,9 @@
     },
     {
       "name": "CtsAccelerationTestCases"
+    },
+    {
+      "name": "hwui_unit_tests"
     }
   ],
   "imports": [