Add media-module-sdk build target.

Bug: 177884752
Test: m media-module-sdk
Change-Id: Ib37f2861a3c12526686b6ec78d9345aead6d51c9

apex/media/Android.bp

@@ -18,3 +18,10 @@ package {
         "//frameworks/av/apex/testing",
     ],
 }
+
+sdk {
+    name: "media-module-sdk",
+    java_sdk_libs: [
+        "framework-media",
+    ],
+}