Add 'Stay unlocked on fold' toogle to settings

Added 'Stay unlocked on fold' toogle to display settings. Enabling this
setting will allow user to keep their device awake after the fold the
device.

Test: atest StayAwakeOnFoldPreferenceControllerTest LogicalDisplayMapperTest
Test: manual
  Built and flashed foldable device and manually tested by
    1. unfolded device -> enable setting -> folded device
    2. unfolded device -> disabled setting -> folded devices
  Built and flashed non-foldable device and manually tested by
    1. Went to Settings -> display -> the toogle setting is not visible
Bug: 274447767
Change-Id: I35fbd0f5d1297ee6e14896e8f3be8301cda6622f

tests/robotests/src/com/android/settings/display/StayAwakeOnFoldPreferenceControllerTest.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2023 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.display;
+
+import static com.android.settings.core.BasePreferenceController.AVAILABLE;
+import static com.android.settings.core.BasePreferenceController.UNSUPPORTED_ON_DEVICE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.content.res.Resources;
+import android.provider.Settings;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class StayAwakeOnFoldPreferenceControllerTest {
+
+    @Mock
+    private Resources mResources;
+    private Context mContext;
+    private StayAwakeOnFoldPreferenceController mController;
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mResources = Mockito.mock(Resources.class);
+        mController = new StayAwakeOnFoldPreferenceController(mContext, "key", mResources);
+    }
+
+    @Test
+    public void getAvailabilityStatus_withConfigNoShow_returnUnsupported() {
+        when(mResources.getBoolean(R.bool.config_stay_awake_on_fold)).thenReturn(false);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(UNSUPPORTED_ON_DEVICE);
+    }
+
+    @Test
+    public void getAvailabilityStatus_withConfigNoShow_returnAvailable() {
+        when(mResources.getBoolean(R.bool.config_stay_awake_on_fold)).thenReturn(true);
+
+        assertThat(mController.getAvailabilityStatus()).isEqualTo(AVAILABLE);
+    }
+
+    @Test
+    public void setChecked_enableStayAwakeOnFold_setChecked() {
+        mController.setChecked(true);
+
+        assertThat(isStayAwakeOnFoldEnabled())
+                .isTrue();
+    }
+
+    @Test
+    public void setChecked_disableStayAwakeOnFold_setUnchecked() {
+        mController.setChecked(false);
+
+        assertThat(isStayAwakeOnFoldEnabled())
+                .isFalse();
+    }
+
+    @Test
+    public void isChecked_enableStayAwakeOnFold_returnTrue() {
+        enableStayAwakeOnFoldPreference();
+
+        assertThat(mController.isChecked()).isTrue();
+    }
+
+    @Test
+    public void isChecked_disableStayAwakeOnFold_returnFalse() {
+        disableStayAwakeOnFoldPreference();
+
+        assertThat(mController.isChecked()).isFalse();
+    }
+
+    private void enableStayAwakeOnFoldPreference() {
+        Settings.System.putInt(
+                mContext.getContentResolver(),
+                Settings.System.STAY_AWAKE_ON_FOLD,
+                1);
+    }
+
+    private void disableStayAwakeOnFoldPreference() {
+        Settings.System.putInt(
+                mContext.getContentResolver(),
+                Settings.System.STAY_AWAKE_ON_FOLD,
+                0);
+    }
+
+    private boolean isStayAwakeOnFoldEnabled() {
+        return (Settings.System.getInt(
+                mContext.getContentResolver(),
+                Settings.System.STAY_AWAKE_ON_FOLD,
+                0) == 1);
+    }
+}