Added settings UI for camera lift trigger gesture

Bug: 37154489
Test: manual + make RunSettingsRoboTests

- Added preference fragment for camera lift gesture
- Added activity alias for camera lift gesture setting
- Added resources + overlays for camera lift gesture setting
- Added config flag for limiting camera lift gesture setting for Pixel
- Added Robolectric tests for camera lift gesture settings classes

Change-Id: Ie4846cb1ea6b5279a19f20cb0299426f0d5cbb71

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

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2017 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 android.content.Context;
+import android.provider.Settings;
+import android.support.v7.preference.Preference;
+
+import android.util.ArrayMap;
+import com.android.settings.R;
+import com.android.settings.core.lifecycle.Lifecycle;
+import com.android.settings.search2.InlineSwitchPayload;
+import com.android.settings.search2.ResultPayload;
+
+public class CameraLiftTriggerPreferenceController extends GesturePreferenceController {
+
+    private static final String PREF_KEY_VIDEO = "gesture_camera_lift_trigger_video";
+
+    private final String mCameraLiftTriggerKey;
+
+    public CameraLiftTriggerPreferenceController(Context context, Lifecycle lifecycle, String key) {
+        super(context, lifecycle);
+        mCameraLiftTriggerKey = key;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return mContext.getResources().getBoolean(
+                R.bool.config_cameraLiftTriggerAvailable);
+    }
+
+    @Override
+    protected String getVideoPrefKey() {
+        return PREF_KEY_VIDEO;
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return mCameraLiftTriggerKey;
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference preference, Object newValue) {
+        boolean enabled = (boolean) newValue;
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                Settings.Secure.CAMERA_LIFT_TRIGGER_ENABLED, enabled ? 0 : 1);
+        return true;
+    }
+
+    @Override
+    protected boolean isSwitchPrefEnabled() {
+        final int triggerEnabled = Settings.Secure.getInt(mContext.getContentResolver(),
+                Settings.Secure.CAMERA_LIFT_TRIGGER_ENABLED, 0);
+        return triggerEnabled == 1;
+    }
+}