Add a DPM method to allow system to query parent profile instance.

Bug: 26830384
Change-Id: Ib12b171b1032bd86488f32f8d22eb0a9efb75e8f
diff --git a/core/java/android/app/admin/DevicePolicyManager.java b/core/java/android/app/admin/DevicePolicyManager.java
index a3c615d..e4e97a1 100644
--- a/core/java/android/app/admin/DevicePolicyManager.java
+++ b/core/java/android/app/admin/DevicePolicyManager.java
@@ -30,6 +30,7 @@
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.content.pm.UserInfo;
 import android.graphics.Bitmap;
 import android.net.ProxyInfo;
 import android.net.Uri;
@@ -5346,6 +5347,22 @@
     }
 
     /**
+     * Called by the system to obtain a {@link DevicePolicyManager} whose calls act on the parent
+     * profile.
+     *
+     * @hide
+     */
+    public DevicePolicyManager getParentProfileInstance(UserInfo uInfo) {
+        mContext.checkSelfPermission(
+                android.Manifest.permission.MANAGE_PROFILE_AND_DEVICE_OWNERS);
+        if (!uInfo.isManagedProfile()) {
+            throw new SecurityException("The user " + uInfo.id
+                    + " does not have a parent profile.");
+        }
+        return new DevicePolicyManager(mContext, true);
+    }
+
+    /**
      * Called by a profile owner of a managed profile to set the color used for customization.
      * This color is used as background color of the confirm credentials screen for that user.
      * The default color is {@link android.graphics.Color#GRAY}.