Annotate MediaCommunicationService for only >= S

Bug: 183737580
Test: build, boot
Change-Id: I9479d05a739ef8070bdeeeda5f819f51c2704afe

apex/media/service/Android.bp

@@ -40,7 +40,10 @@ java_sdk_library {
     ],
     libs: [
         "updatable-media",
+        "modules-annotation-minsdk",
+        "modules-utils-build",
     ],
+    jarjar_rules: "jarjar_rules.txt",
     sdk_version: "system_server_current",
     min_sdk_version: "29", // TODO: We may need to bump this at some point.
     apex_available: [

apex/media/service/jarjar_rules.txt

@@ -0,0 +1 @@
+rule com.android.modules.** android.media.internal.@1

apex/media/service/java/com/android/server/media/MediaCommunicationService.java

@@ -32,6 +32,7 @@ import android.media.MediaParceledListSlice;
 import android.media.Session2CommandGroup;
 import android.media.Session2Token;
 import android.os.Binder;
+import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
@@ -44,6 +45,7 @@ import android.util.SparseArray;
 import android.util.SparseIntArray;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.modules.annotation.MinSdk;
 import com.android.server.SystemService;
 
 import java.lang.ref.WeakReference;
@@ -59,6 +61,7 @@ import java.util.stream.Collectors;
  * and their ongoing media playback state.
  * @hide
  */
+@MinSdk(Build.VERSION_CODES.S)
 public class MediaCommunicationService extends SystemService {
     private static final String TAG = "MediaCommunicationService";
     private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);