Make ctor of MediaController.PlaybackInfo @SystemApi

Bug: 167522787
Test: make update-api -j; make -j;
Change-Id: I406097a10204ccc8e75d194fae8ec84f3a8154ac
diff --git a/api/module-lib-current.txt b/api/module-lib-current.txt
index 17545a4..b9eafc4 100644
--- a/api/module-lib-current.txt
+++ b/api/module-lib-current.txt
@@ -42,6 +42,10 @@
 
 package android.media.session {
 
+  public static final class MediaController.PlaybackInfo implements android.os.Parcelable {
+    ctor public MediaController.PlaybackInfo(int, int, @IntRange(from=0) int, @IntRange(from=0) int, @NonNull android.media.AudioAttributes, @Nullable String);
+  }
+
   public final class MediaSession {
     field public static final int FLAG_EXCLUSIVE_GLOBAL_PRIORITY = 65536; // 0x10000
   }