Expose bugreporting API as system API.

BUG: 111441001
Test: Builds
Change-Id: I1530f92971807b7e43c763a58dd1e18e793255da
(cherry picked from commit b3857c4f7301b0b9c80e6db3f27c8ebada82a60f)
diff --git a/core/java/android/os/BugreportManager.java b/core/java/android/os/BugreportManager.java
index 6f5f807..3a5b8a8 100644
--- a/core/java/android/os/BugreportManager.java
+++ b/core/java/android/os/BugreportManager.java
@@ -21,6 +21,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.content.Context;
 import android.os.IBinder.DeathRecipient;
@@ -35,8 +36,7 @@
  *
  * @hide
  */
-// TODO: Expose API when the implementation is more complete.
-//@SystemApi
+@SystemApi
 @SystemService(Context.BUGREPORT_SERVICE)
 public class BugreportManager {
     private final Context mContext;