transcoding: move transcoding service to apex

And conditionally start transcoding service

bug: 159172726
Change-Id: I13d126f342d4ea944d1e9186b4edcdfe5fb4b0a0
diff --git a/apex/manifest.json b/apex/manifest.json
index f1f69f4..b7d8fc8 100644
--- a/apex/manifest.json
+++ b/apex/manifest.json
@@ -1,4 +1,10 @@
 {
   "name": "com.android.media",
-  "version": 309999900
+  "version": 309999900,
+  "requireNativeLibs": [
+    "libandroid.so",
+    "libbinder_ndk.so",
+    "libmediandk.so",
+    ":sphal"
+  ]
 }