Explicit apex_available clauses

Declare explicit apex availability/usage here instead of in
a list hidden within the apex build tools.

Bug: 215589022
Test: build
Change-Id: Id4708473d2528ffdab6c91c71d31c7373749858c
diff --git a/libs/nativebase/Android.bp b/libs/nativebase/Android.bp
index 1a4729c..77b23db 100644
--- a/libs/nativebase/Android.bp
+++ b/libs/nativebase/Android.bp
@@ -45,5 +45,9 @@
             enabled: true,
         },
     },
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.media.swcodec",
+    ],
     min_sdk_version: "29",
 }