New settings preference to swipe bottom for notification

Add new gesture toggle at:
Settings > System > Gesture > Swipe for notification

Bug: 154080211
Test: manual check Settings > System > Gesture > Swipe for notifications
Test: manual check it is disabled after One-handed mode toggled on
Test: make RunSettingsRoboTests ROBOTEST_FILTER=\
"SwipeBottomToNotificationSettingsTest"
Test: make RunSettingsRoboTests ROBOTEST_FILTER=\
"SwipeBottomToNotificationPreferenceControllerTest"

Change-Id: Iec18dfd323981ae7489d142b79c6035f3499eb91

src/com/android/settings/gestures/SwipeBottomToNotificationPreferenceController.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2020 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.gestures;
+
+import static android.provider.Settings.Secure.SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED;
+
+import static com.android.settings.gestures.OneHandedEnablePreferenceController.SUPPORT_ONE_HANDED_MODE;
+
+import android.content.Context;
+import android.os.SystemProperties;
+import android.provider.Settings;
+import android.text.TextUtils;
+
+import com.android.settings.R;
+import com.android.settings.core.TogglePreferenceController;
+
+/**
+ * Handles swipe bottom to expand notification panel gesture.
+ **/
+public class SwipeBottomToNotificationPreferenceController extends TogglePreferenceController {
+
+    private static final int ON = 1;
+    private static final int OFF = 0;
+
+    private static final String PREF_KEY = "gesture_swipe_bottom_to_notification";
+
+    public SwipeBottomToNotificationPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    /** Indicates whether the gesture is available or not. */
+    public static boolean isGestureAvailable(Context context) {
+        // Disable the gesture once One-Handed mode gesture enabled.
+        if (SystemProperties.getBoolean(SUPPORT_ONE_HANDED_MODE, false)) {
+            return !OneHandedSettingsUtils.isOneHandedModeEnabled(context);
+        }
+        return true;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return isGestureAvailable(mContext) ? AVAILABLE : DISABLED_DEPENDENT_SETTING;
+    }
+
+    @Override
+    public boolean isSliceable() {
+        return TextUtils.equals(getPreferenceKey(), PREF_KEY);
+    }
+
+    @Override
+    public boolean isPublicSlice() {
+        return true;
+    }
+
+    @Override
+    public boolean setChecked(boolean isChecked) {
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED, isChecked ? ON : OFF);
+        return true;
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.Secure.getInt(mContext.getContentResolver(),
+                SWIPE_BOTTOM_TO_NOTIFICATION_ENABLED, OFF) == ON;
+    }
+
+    @Override
+    public CharSequence getSummary() {
+        // This toggle preference summary will be updated in gesture preference page since we bound
+        // it with entry preference in gesture.xml
+        return mContext.getText(
+                isChecked() ? R.string.gesture_setting_on : R.string.gesture_setting_off);
+    }
+}