Retail mode flag and some clients for it

Bug: 27280140
Change-Id: Ide33e941b9c71eb925b5977d0b0d62198537ca14
diff --git a/core/java/android/content/pm/UserInfo.java b/core/java/android/content/pm/UserInfo.java
index dd3a36c..6cd8403 100644
--- a/core/java/android/content/pm/UserInfo.java
+++ b/core/java/android/content/pm/UserInfo.java
@@ -28,8 +28,8 @@
  */
 public class UserInfo implements Parcelable {
 
-    /** 8 bits for user type */
-    public static final int FLAG_MASK_USER_TYPE = 0x000000FF;
+    /** 16 bits for user type */
+    public static final int FLAG_MASK_USER_TYPE = 0x0000FFFF;
 
     /**
      * *************************** NOTE ***************************
@@ -87,6 +87,11 @@
      */
     public static final int FLAG_EPHEMERAL = 0x00000100;
 
+    /**
+     * User is for demo purposes only and can be removed at any time.
+     */
+    public static final int FLAG_DEMO = 0x00000200;
+
     public static final int NO_PROFILE_GROUP_ID = UserHandle.USER_NULL;
 
     public int id;
@@ -153,6 +158,10 @@
         return (flags & FLAG_INITIALIZED) == FLAG_INITIALIZED;
     }
 
+    public boolean isDemo() {
+        return (flags & FLAG_DEMO) == FLAG_DEMO;
+    }
+
     /**
      * Returns true if the user is a split system user.
      * <p>If {@link UserManager#isSplitSystemUser split system user mode} is not enabled,
diff --git a/core/java/android/os/UserManager.java b/core/java/android/os/UserManager.java
index dcec982..2613994 100644
--- a/core/java/android/os/UserManager.java
+++ b/core/java/android/os/UserManager.java
@@ -1972,6 +1972,10 @@
         if (!supportsMultipleUsers()) {
             return false;
         }
+        // If Demo Mode is on, don't show user switcher
+        if (isDeviceInDemoMode(mContext)) {
+            return false;
+        }
         List<UserInfo> users = getUsers(true);
         if (users == null) {
            return false;
@@ -1988,6 +1992,14 @@
     }
 
     /**
+     * @hide
+     */
+    public static boolean isDeviceInDemoMode(Context context) {
+        return Settings.Global.getInt(context.getContentResolver(),
+                Settings.Global.DEVICE_DEMO_MODE, 0) > 0;
+    }
+
+    /**
      * Returns a serial number on this device for a given userHandle. User handles can be recycled
      * when deleting and creating users, but serial numbers are not reused until the device is wiped.
      * @param userHandle
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index f04b2d4..a5c2500 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -8538,6 +8538,15 @@
         public static final String SAFE_BOOT_DISALLOWED = "safe_boot_disallowed";
 
         /**
+         * Whether this device is currently in retail demo mode. If true, device
+         * usage is severely limited.
+         * <p>
+         * Type: int (0 for false, 1 for true)
+         * @hide
+         */
+        public static final String DEVICE_DEMO_MODE = "device_demo_mode";
+
+        /**
          * Settings to backup. This is here so that it's in the same place as the settings
          * keys and easy to update.
          *
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index e64d905..904523a 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -2481,4 +2481,7 @@
     <string-array translatable="false" name="config_defaultPinnerServiceFiles">
     </string-array>
 
+    <!-- Component that is the default launcher when demo mode is enabled. -->
+    <string name="config_demoModeLauncherComponent"></string>
+
 </resources>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 9b7fbd8..ae38fef 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -1104,6 +1104,7 @@
   <java-symbol type="string" name="lockscreen_transport_pause_description" />
   <java-symbol type="string" name="config_ethernet_tcp_buffers" />
   <java-symbol type="string" name="config_wifi_tcp_buffers" />
+  <java-symbol type="string" name="config_demoModeLauncherComponent" />
 
   <java-symbol type="plurals" name="bugreport_countdown" />
   <java-symbol type="plurals" name="duration_hours" />