Annotate mainline code runs on only some versions

Include appropriate annotations to indicate some code that
is included in mainline modules (back to Q) but is only ever
used in later modules (Android R or S).

Bug: 188851874
Test: build, re-lint
Change-Id: Iebee93f1bf1c316e2a45ffed8a8d833d8a6596a7

apex/media/framework/java/android/media/MediaCommunicationManager.java

@@ -34,6 +34,8 @@ import android.service.media.MediaBrowserService;
 import android.util.Log;
 import android.view.KeyEvent;
 
+import androidx.annotation.RequiresApi;
+
 import com.android.internal.annotations.GuardedBy;
 import com.android.modules.annotation.MinSdk;
 import com.android.modules.utils.build.SdkLevel;
@@ -49,6 +51,7 @@ import java.util.concurrent.Executor;
  * that applications have published to express their ongoing media playback state.
  */
 @MinSdk(Build.VERSION_CODES.S)
+@RequiresApi(Build.VERSION_CODES.S)
 @SystemService(Context.MEDIA_COMMUNICATION_SERVICE)
 public class MediaCommunicationManager {
     private static final String TAG = "MediaCommunicationManager";

apex/media/framework/java/android/media/MediaFrameworkInitializer.java

@@ -23,6 +23,8 @@ import android.app.SystemServiceRegistry;
 import android.content.Context;
 import android.os.Build;
 
+import androidx.annotation.RequiresApi;
+
 import com.android.modules.annotation.MinSdk;
 import com.android.modules.utils.build.SdkLevel;
 
@@ -32,6 +34,7 @@ import com.android.modules.utils.build.SdkLevel;
  * @hide
  */
 @MinSdk(Build.VERSION_CODES.S)
+@RequiresApi(Build.VERSION_CODES.S)
 @SystemApi(client = Client.MODULE_LIBRARIES)
 public class MediaFrameworkInitializer {
     private MediaFrameworkInitializer() {

apex/media/framework/java/android/media/MediaParser.java

@@ -199,6 +199,7 @@ import java.util.function.Function;
  *
  * </pre>
  */
+@RequiresApi(Build.VERSION_CODES.R)
 public final class MediaParser {
 
     /**

apex/media/framework/java/android/media/MediaTranscodingManager.java

@@ -33,6 +33,8 @@ import android.os.ServiceSpecificException;
 import android.system.Os;
 import android.util.Log;
 
+import androidx.annotation.RequiresApi;
+
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.modules.annotation.MinSdk;
@@ -85,6 +87,7 @@ import java.util.concurrent.Executors;
  @hide
  */
 @MinSdk(Build.VERSION_CODES.S)
+@RequiresApi(Build.VERSION_CODES.S)
 @SystemApi
 public final class MediaTranscodingManager {
     private static final String TAG = "MediaTranscodingManager";