More multi-user methods in PM

pm can list installed packages by user now.

Bug: 6926465

Change-Id: I822311bfd6e7e2d6fb315fc484739fbf953c9bb6
diff --git a/core/java/android/content/pm/IPackageManager.aidl b/core/java/android/content/pm/IPackageManager.aidl
index 0e1fe3e..b0ae5da 100644
--- a/core/java/android/content/pm/IPackageManager.aidl
+++ b/core/java/android/content/pm/IPackageManager.aidl
@@ -127,7 +127,7 @@
      * limit that kicks in when flags are included that bloat up the data
      * returned.
      */
-    ParceledListSlice getInstalledPackages(int flags, in String lastRead);
+    ParceledListSlice getInstalledPackages(int flags, in String lastRead, in int userId);
 
     /**
      * This implements getInstalledApplications via a "last returned row"