Enable Name and Avatar change without turning on multi-user

Primary user will be displayed in user list even when the
multi-user settings is disabled.
This will allow users to change the name and avatar of
primary user without enabling the multi-user feature.

Test: croot && make RunSettingsRoboTests -j40
ROBOTEST_FILTER="com.android.settings.users.UserSettingsTest"

Bug: 246732754
Change-Id: I4eb5aaf97630135960410bea7cdddc52b5848a1e

src/com/android/settings/users/UserSettings.java

@@ -1196,11 +1196,19 @@ public class UserSettings extends SettingsPreferenceFragment
         if (context == null) {
             return;
         }
-        final List<UserInfo> users = mUserManager.getAliveUsers()
-                // Only users that can be switched to should show up here.
-                // e.g. Managed profiles appear under Accounts Settings instead
-                .stream().filter(UserInfo::supportsSwitchToByUser)
-                .collect(Collectors.toList());
+
+        List<UserInfo> users;
+        if (mUserCaps.mUserSwitcherEnabled) {
+            // Only users that can be switched to should show up here.
+            // e.g. Managed profiles appear under Accounts Settings instead
+            users = mUserManager.getAliveUsers().stream()
+                    .filter(UserInfo::supportsSwitchToByUser)
+                    .collect(Collectors.toList());
+        } else {
+            // Only current user will be displayed in case of multi-user switch is disabled
+            users = List.of(mUserManager.getUserInfo(context.getUserId()));
+        }
+
         final ArrayList<Integer> missingIcons = new ArrayList<>();
         final ArrayList<UserPreference> userPreferences = new ArrayList<>();
 
@@ -1276,7 +1284,6 @@ public class UserSettings extends SettingsPreferenceFragment
             userPreferences.add(pref);
         }
 
-
         // Sort list of users by serialNum
         Collections.sort(userPreferences, UserPreference.SERIAL_NUMBER_COMPARATOR);
 
@@ -1299,7 +1306,6 @@ public class UserSettings extends SettingsPreferenceFragment
         // Remove everything from mUserListCategory and add new users.
         mUserListCategory.removeAll();
 
-        // If multi-user is disabled, just show top info and return.
         final Preference addUserOnLockScreen = getPreferenceScreen().findPreference(
                 mAddUserWhenLockedPreferenceController.getPreferenceKey());
         mAddUserWhenLockedPreferenceController.updateState(addUserOnLockScreen);
@@ -1311,16 +1317,11 @@ public class UserSettings extends SettingsPreferenceFragment
         final Preference multiUserTopIntroPreference = getPreferenceScreen().findPreference(
                 mMultiUserTopIntroPreferenceController.getPreferenceKey());
         mMultiUserTopIntroPreferenceController.updateState(multiUserTopIntroPreference);
-        mUserListCategory.setVisible(mUserCaps.mUserSwitcherEnabled);
         updateGuestPreferences();
         updateGuestCategory(context, users);
         updateAddUser(context);
         updateAddSupervisedUser(context);
 
-        if (!mUserCaps.mUserSwitcherEnabled) {
-            return;
-        }
-
         for (UserPreference userPreference : userPreferences) {
             userPreference.setOrder(Preference.DEFAULT_ORDER);
             mUserListCategory.addPreference(userPreference);

tests/robotests/src/com/android/settings/users/UserSettingsTest.java

@@ -177,6 +177,7 @@ public class UserSettingsTest {
         doReturn(prefs).when(mMockPreferenceManager).getSharedPreferences();
         doReturn(mContext).when(mMockPreferenceManager).getContext();
         doReturn(mock(PreferenceScreen.class)).when(mFragment).getPreferenceScreen();
+        doReturn(ACTIVE_USER_ID).when(mContext).getUserId();
 
         mFragment.mMePreference = mMePreference;
         mFragment.mAddUser = mAddUserPreference;
@@ -443,6 +444,7 @@ public class UserSettingsTest {
 
     @Test
     public void updateUserList_userSwitcherDisabled_shouldNotShowAddUser() {
+        givenUsers(getAdminUser(true));
         mUserCapabilities.mCanAddUser = true;
         mUserCapabilities.mUserSwitcherEnabled = false;
 
@@ -453,6 +455,7 @@ public class UserSettingsTest {
 
     @Test
     public void updateUserList_userSwitcherDisabled_shouldNotShowAddGuest() {
+        givenUsers(getAdminUser(true));
         mUserCapabilities.mCanAddGuest = true;
         mUserCapabilities.mUserSwitcherEnabled = false;
 
@@ -511,6 +514,47 @@ public class UserSettingsTest {
         assertThat(userPref.getOnPreferenceClickListener()).isSameInstanceAs(mFragment);
     }
 
+    @Test
+    public void updateUserList_existingSecondaryUser_shouldAddOnlyCurrUser_MultiUserIsDisabled() {
+        givenUsers(getAdminUser(true), getSecondaryUser(false));
+        mUserCapabilities.mUserSwitcherEnabled = false;
+
+        mFragment.updateUserList();
+
+        ArgumentCaptor<UserPreference> captor = ArgumentCaptor.forClass(UserPreference.class);
+        verify(mFragment.mUserListCategory, times(1))
+                .addPreference(captor.capture());
+
+        List<UserPreference> userPrefs = captor.getAllValues();
+        assertThat(userPrefs.size()).isEqualTo(1);
+        assertThat(userPrefs.get(0)).isSameInstanceAs(mMePreference);
+    }
+
+    @Test
+    public void updateUserList_existingSecondaryUser_shouldAddSecondaryUser_MultiUserIsEnabled() {
+        givenUsers(getAdminUser(true), getSecondaryUser(false));
+
+        mFragment.updateUserList();
+
+        ArgumentCaptor<UserPreference> captor = ArgumentCaptor.forClass(UserPreference.class);
+        verify(mFragment.mUserListCategory, times(2))
+                .addPreference(captor.capture());
+
+        List<UserPreference> userPrefs = captor.getAllValues();
+        UserPreference adminPref = userPrefs.get(0);
+        UserPreference secondaryPref = userPrefs.get(1);
+
+        assertThat(userPrefs.size()).isEqualTo(2);
+        assertThat(adminPref).isSameInstanceAs(mMePreference);
+        assertThat(secondaryPref.getUserId()).isEqualTo(INACTIVE_SECONDARY_USER_ID);
+        assertThat(secondaryPref.getTitle()).isEqualTo(SECONDARY_USER_NAME);
+        assertThat(secondaryPref.getIcon()).isNotNull();
+        assertThat(secondaryPref.getKey()).isEqualTo("id=" + INACTIVE_SECONDARY_USER_ID);
+        assertThat(secondaryPref.isEnabled()).isEqualTo(true);
+        assertThat(secondaryPref.isSelectable()).isEqualTo(true);
+        assertThat(secondaryPref.getOnPreferenceClickListener()).isSameInstanceAs(mFragment);
+    }
+
     @Test
     public void updateUserList_existingRestrictedUser_shouldAddRestrictedUserPreference() {
         givenUsers(getAdminUser(true), getRestrictedUser(false));
@@ -800,6 +844,8 @@ public class UserSettingsTest {
         List<UserInfo> users = Arrays.asList(userInfo);
         doReturn(users).when(mUserManager).getUsers();
         doReturn(users).when(mUserManager).getAliveUsers();
+        users.forEach(user ->
+                doReturn(user).when(mUserManager).getUserInfo(user.id));
     }
 
     private static void removeFlag(UserInfo userInfo, int flag) {