Fix documentation of EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME

Say it is supported only if there is only one device admin receiver
that requires BIND_DEVICE_ADMIN.

BUG:23370442
Change-Id: I19e1e2e218f224bc337f7d8eec2b62fcb4c08d91
diff --git a/core/java/android/app/admin/DevicePolicyManager.java b/core/java/android/app/admin/DevicePolicyManager.java
index e3414d9..7ffac0a 100644
--- a/core/java/android/app/admin/DevicePolicyManager.java
+++ b/core/java/android/app/admin/DevicePolicyManager.java
@@ -213,7 +213,8 @@
 
      * @see DeviceAdminReceiver
      * @deprecated Use {@link #EXTRA_PROVISIONING_DEVICE_ADMIN_COMPONENT_NAME}. This extra is still
-     * supported.
+     * supported, but only if there is only one device admin receiver in the package that requires
+     * the permission {@link android.Manifest.permission#BIND_DEVICE_ADMIN}.
      */
     @Deprecated
     public static final String EXTRA_PROVISIONING_DEVICE_ADMIN_PACKAGE_NAME