Mpeg2Extractor: Fix to generate static library

Bug: 147270120

Test: builds

Change-Id: Id6ceed1afca298f3b5881585f0a9f81accfe9688
diff --git a/media/extractors/mpeg2/Android.bp b/media/extractors/mpeg2/Android.bp
index 8638cdc..6e37ac0 100644
--- a/media/extractors/mpeg2/Android.bp
+++ b/media/extractors/mpeg2/Android.bp
@@ -71,4 +71,11 @@
         "com.android.media",
         "test_com.android.media",
     ],
+
+    static: {
+        apex_available: [
+            // Needed for unit tests
+            "//apex_available:platform",
+        ],
+    },
 }