Temporarily disable multiuser for specific builds

Enable switching through power menu for other builds

Change-Id: I0bd8450583e078b0a83fb639337427ab84db5ab8

Author: Amith Yamasani

core/java/android/os/UserManager.java

@@ -320,6 +320,8 @@ public void wipeUser(int userHandle) {
      * @return a value greater than or equal to 1 
      */
     public static int getMaxSupportedUsers() {
+        // Don't allow multiple users on certain builds
+        if (android.os.Build.ID.startsWith("JVP")) return 1;
         return SystemProperties.getInt("fw.max_users",
                 Resources.getSystem().getInteger(R.integer.config_multiuserMaximumUsers));
     }

policy/src/com/android/internal/policy/impl/GlobalActions.java

@@ -314,7 +314,8 @@ public boolean showBeforeProvisioning() {
         }
 
         // one more thing: optionally add a list of users to switch to
-        if (SystemProperties.getBoolean("fw.power_user_switcher", false)) {
+        // temporarily enable this by default
+        if (true || SystemProperties.getBoolean("fw.power_user_switcher", false)) {
             addUsersToMenu(mItems);
         }