Initial skeleton of new "Supervision" settings screen with top-level entry point.

Intake bug: b/379312924

Test: atest SupervisionDashboardScreenTest
Test: atest SupervisionMainSwitchPreferenceTest
Test: manually on real device
Bug: 383568136
Change-Id: I6bb8aa432c1b4527cec0f4c2593fd1494975503d
Flag: android.app.supervision.flags.enable_supervision_settings_screen

tests/robotests/src/com/android/settings/supervision/SupervisionDashboardScreenTest.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2025 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.supervision
+
+import android.app.supervision.flags.Flags
+import android.content.Context
+import android.platform.test.annotations.DisableFlags
+import android.platform.test.annotations.EnableFlags
+import android.platform.test.flag.junit.SetFlagsRule
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class SupervisionDashboardScreenTest {
+    @get:Rule val setFlagsRule = SetFlagsRule()
+
+    private val preferenceScreenCreator = SupervisionDashboardScreen()
+
+    private val context: Context = ApplicationProvider.getApplicationContext()
+
+    @Test
+    fun key() {
+        assertThat(preferenceScreenCreator.key).isEqualTo(SupervisionDashboardScreen.KEY)
+    }
+
+    @Test
+    @EnableFlags(Flags.FLAG_ENABLE_SUPERVISION_SETTINGS_SCREEN)
+    fun flagEnabled() {
+        assertThat(preferenceScreenCreator.isFlagEnabled(context)).isTrue()
+    }
+
+    @Test
+    @DisableFlags(Flags.FLAG_ENABLE_SUPERVISION_SETTINGS_SCREEN)
+    fun flagDisabled() {
+        assertThat(preferenceScreenCreator.isFlagEnabled(context)).isFalse()
+    }
+}