Migrate System -> Languages to Catalyst

Bug: 375543649
Test: atest SettingsUnitTests
Flag: com.android.settings.flags.catalyst_language_setting
Change-Id: If7d01bd76ebf8cecb3bcc6b6528cfaec176cdc93

tests/unit/Android.bp

@@ -26,11 +26,14 @@ android_test {
         "androidx.test.ext.junit",
         "androidx.test.rules",
         "flag-junit",
+        "kotlin-test",
+        "mockito-kotlin2",
         "mockito-target-minus-junit4",
         "platform-test-annotations",
         "platform-test-rules",
         "truth",
         "kotlinx_coroutines_test",
+        "SettingsLibPreference-testutils",
         "Settings-testutils2",
         "servicestests-utils",
         // Don't add SettingsLib libraries here - you can use them directly as they are in the

tests/unit/src/com/android/settings/language/LanguageSettingScreenTest.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.settings.language
+
+import android.content.ComponentName
+import android.content.Context
+import android.content.ContextWrapper
+import android.content.pm.PackageManager
+import android.content.res.Resources
+import com.android.settings.Settings.LanguageSettingsActivity
+import com.android.settings.flags.Flags
+import com.android.settingslib.preference.CatalystScreenTestCase
+import com.google.common.truth.Truth.assertThat
+import org.junit.Assert
+import org.junit.Test
+import org.mockito.ArgumentMatchers.anyInt
+import org.mockito.kotlin.doReturn
+import org.mockito.kotlin.mock
+import org.mockito.kotlin.stub
+
+class LanguageSettingScreenTest: CatalystScreenTestCase() {
+    override val preferenceScreenCreator = LanguageSettingScreen()
+
+    override val flagName: String
+        get() = Flags.FLAG_CATALYST_LANGUAGE_SETTING
+
+    @Test
+    fun key() {
+        assertThat(preferenceScreenCreator.key).isEqualTo(LanguageSettingScreen.KEY)
+    }
+
+    override fun migration() {}
+}