Add a new getPackageInfoAsUser as a SystemApi.

This is needed so the PermissionController can differentiate between
multiple versions of the same app.

Bug: 119811056
Test: Call API.
Change-Id: I19150e1c8e5f204a846500cfe0021da742235213
diff --git a/core/java/android/content/Intent.java b/core/java/android/content/Intent.java
index e9b2404..ab271c9 100644
--- a/core/java/android/content/Intent.java
+++ b/core/java/android/content/Intent.java
@@ -1767,6 +1767,9 @@
      * that should be managed by the launched UI.
      * </p>
      * <p>
+     * <li> {@link #EXTRA_USER} specifies the UserHandle of the user that owns the app.
+     * </p>
+     * <p>
      * Output: Nothing.
      * </p>
      *