Use safe_union in FieldSupportedValues

Test: make cts -j123 && cts-tradefed run cts-dev -m \
CtsMediaTestCases --compatibility:module-arg \
CtsMediaTestCases:include-annotation:\
android.platform.test.annotations.RequiresDevice

Bug: 129084824
Change-Id: I9ae77a6a6697dcc508415090640a21841caba345
diff --git a/media/c2/1.0/Android.bp b/media/c2/1.0/Android.bp
index 7307a81..895e9db 100644
--- a/media/c2/1.0/Android.bp
+++ b/media/c2/1.0/Android.bp
@@ -27,6 +27,7 @@
         "android.hardware.media.omx@1.0",
         "android.hardware.media@1.0",
         "android.hidl.base@1.0",
+        "android.hidl.safe_union@1.0",
     ],
     gen_java: false,
 }