Fixes user switcher name and icon regressions.

In the full-screen user switcher:
- The guest action in the Add menu is now "Add Guest" instead of just
  "Guest"
- The add user icon is updated to what it's meant to be for large
  screens
- In guest mode, the guest user label is back to reading "exit guest"
  instead of just "guest"

Fix: 253623761
Test: manually verified on a large screen device that everything
mentioned above is correct.

Change-Id: I06cd4d21d3303765aa70b81bd714933f8da433f2

packages/SystemUI/src/com/android/systemui/user/ui/viewmodel/UserSwitcherViewModel.kt

@@ -20,6 +20,7 @@ package com.android.systemui.user.ui.viewmodel
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import com.android.systemui.R
+import com.android.systemui.common.shared.model.Text
 import com.android.systemui.common.ui.drawable.CircularDrawable
 import com.android.systemui.flags.FeatureFlags
 import com.android.systemui.flags.Flags
@@ -152,7 +153,12 @@ private constructor(
     ): UserViewModel {
         return UserViewModel(
             viewKey = model.id,
-            name = model.name,
+            name =
+                if (model.isGuest) {
+                    Text.Resource(com.android.settingslib.R.string.guest_exit_quick_settings_button)
+                } else {
+                    model.name
+                },
             image = CircularDrawable(model.image),
             isSelectionMarkerVisible = model.isSelected,
             alpha =
@@ -178,6 +184,7 @@ private constructor(
                         isAddSupervisedUser = model == UserActionModel.ADD_SUPERVISED_USER,
                         isAddUser = model == UserActionModel.ADD_USER,
                         isGuest = model == UserActionModel.ENTER_GUEST_MODE,
+                        isTablet = true,
                     )
                 },
             textResourceId =
@@ -190,6 +197,7 @@ private constructor(
                         isGuestUserResetting = guestUserInteractor.isGuestUserResetting,
                         isAddSupervisedUser = model == UserActionModel.ADD_SUPERVISED_USER,
                         isAddUser = model == UserActionModel.ADD_USER,
+                        isTablet = true,
                     )
                 },
             onClicked = {