Include sdk versioning proto in media apex

Allows SdkExtensions to inspect its version to decide what the extension
sdk version is on-device.

Bug: 188787081
Test: m com.android.media and inspect
Change-Id: I25df15ff35e004f63b2788e862df5778d21505f7
diff --git a/apex/Android.bp b/apex/Android.bp
index dc22628..a86d2b9 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -84,6 +84,7 @@
     name: "com.android.media",
     manifest: "manifest.json",
     defaults: ["com.android.media-defaults"],
+    prebuilts: ["current_sdkinfo"],
 }
 
 linker_config {