Add service-media-s to merged stubs

service-media-s does not currently export any system server apis,
however its sources are used to generate the 'old style' system server
stubs.

Test: m checkapi
Bug: 177640454
Change-Id: I075915212af44a207ad70b0761403cacc0a80241
diff --git a/api/Android.bp b/api/Android.bp
index 1fdf177..4baf7c1 100644
--- a/api/Android.bp
+++ b/api/Android.bp
@@ -351,6 +351,7 @@
 genrule {
     name: "services-system-server-current.txt",
     srcs: [
+        ":service-media-s{.system-server.api.txt}",
         ":service-permission{.system-server.api.txt}",
         ":non-updatable-system-server-current.txt",
     ],
@@ -374,6 +375,7 @@
 genrule {
     name: "services-system-server-removed.txt",
     srcs: [
+        ":service-media-s{.system-server.removed-api.txt}",
         ":service-permission{.system-server.removed-api.txt}",
         ":non-updatable-system-server-removed.txt",
     ],