Add DISALLOW_CELLULAR_2G As a New User Restriction

Bug: 247121216
Test: atest UserRestrictionsTest
Change-Id: I9be85ae7a9bfb3f287ea972bbaac35469e8d772b

core/api/current.txt

@@ -32238,6 +32238,7 @@ package android.os {
     field public static final String DISALLOW_BLUETOOTH = "no_bluetooth";
     field public static final String DISALLOW_BLUETOOTH_SHARING = "no_bluetooth_sharing";
     field public static final String DISALLOW_CAMERA_TOGGLE = "disallow_camera_toggle";
+    field public static final String DISALLOW_CELLULAR_2G = "no_cellular_2g";
     field public static final String DISALLOW_CHANGE_WIFI_STATE = "no_change_wifi_state";
     field public static final String DISALLOW_CONFIG_BLUETOOTH = "no_config_bluetooth";
     field public static final String DISALLOW_CONFIG_BRIGHTNESS = "no_config_brightness";

core/java/android/os/UserManager.java

@@ -1484,6 +1484,22 @@ public class UserManager {
      */
     public static final String KEY_RESTRICTIONS_PENDING = "restrictions_pending";
 
+    /**
+     * Specifies if a user is not allowed to use 2g networks.
+     *
+     * <p>This restriction can only be set by a device owner or a profile owner of an
+     * organization-owned managed profile on the parent profile.
+     * In all cases, the setting applies globally on the device and will prevent the device from
+     * scanning for or connecting to 2g networks, except in the case of an emergency.
+     *
+     * <p>The default value is <code>false</code>.
+     *
+     * @see DevicePolicyManager#addUserRestriction(ComponentName, String)
+     * @see DevicePolicyManager#clearUserRestriction(ComponentName, String)
+     * @see #getUserRestrictions()
+     */
+    public static final String DISALLOW_CELLULAR_2G = "no_cellular_2g";
+
     /**
      * List of key values that can be passed into the various user restriction related methods
      * in {@link UserManager} & {@link DevicePolicyManager}.
@@ -1565,6 +1581,7 @@ public class UserManager {
             DISALLOW_SHARING_ADMIN_CONFIGURED_WIFI,
             DISALLOW_WIFI_DIRECT,
             DISALLOW_ADD_WIFI_CONFIG,
+            DISALLOW_CELLULAR_2G,
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface UserRestrictionKey {}

services/core/java/com/android/server/pm/UserRestrictionsUtils.java

@@ -147,7 +147,8 @@ public class UserRestrictionsUtils {
             UserManager.DISALLOW_WIFI_TETHERING,
             UserManager.DISALLOW_SHARING_ADMIN_CONFIGURED_WIFI,
             UserManager.DISALLOW_WIFI_DIRECT,
-            UserManager.DISALLOW_ADD_WIFI_CONFIG
+            UserManager.DISALLOW_ADD_WIFI_CONFIG,
+            UserManager.DISALLOW_CELLULAR_2G
     });
 
     public static final Set<String> DEPRECATED_USER_RESTRICTIONS = Sets.newArraySet(
@@ -195,7 +196,8 @@ public class UserRestrictionsUtils {
             UserManager.DISALLOW_CHANGE_WIFI_STATE,
             UserManager.DISALLOW_WIFI_TETHERING,
             UserManager.DISALLOW_WIFI_DIRECT,
-            UserManager.DISALLOW_ADD_WIFI_CONFIG
+            UserManager.DISALLOW_ADD_WIFI_CONFIG,
+            UserManager.DISALLOW_CELLULAR_2G
     );
 
     /**
@@ -234,7 +236,8 @@ public class UserRestrictionsUtils {
                     UserManager.DISALLOW_CHANGE_WIFI_STATE,
                     UserManager.DISALLOW_WIFI_TETHERING,
                     UserManager.DISALLOW_WIFI_DIRECT,
-                    UserManager.DISALLOW_ADD_WIFI_CONFIG
+                    UserManager.DISALLOW_ADD_WIFI_CONFIG,
+                    UserManager.DISALLOW_CELLULAR_2G
     );
 
     /**