Add apex_available for AdServices

This CL enables apex availability for AdServices, which depends on this
package via build targets being added in tflite-support.

Test: m
Bug: 228842813
Change-Id: I45ce2e3ec5e00e84a5f00d5a2eeaac9e7c7eaf14
diff --git a/value/Android.bp b/value/Android.bp
index 2f554aa..b405735 100644
--- a/value/Android.bp
+++ b/value/Android.bp
@@ -51,6 +51,7 @@
     apex_available: [
         "//apex_available:platform",
         "com.android.extservices",
+        "com.android.adservices",
     ],
 }