Add new widget SingleTargetGearPreference

Add the new widget SingleTargetGearPreference
with a gear on the side.

Bug: 110238502
Test: m -j SettingsRoboTests RunSettingsRoboTests
Change-Id: I7463e5b4fdd8bc86d0ab6cb930f0053ce0fa79fa

src/com/android/settings/widget/SingleTargetGearPreference.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2018 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.widget;
+
+import android.content.Context;
+
+import androidx.core.content.res.TypedArrayUtils;
+import androidx.preference.Preference;
+import android.util.AttributeSet;
+
+import com.android.settings.R;
+
+/**
+ * A preference with single target and a gear icon on the side.
+ */
+public class SingleTargetGearPreference extends Preference {
+
+    public SingleTargetGearPreference(Context context, AttributeSet attrs,
+            int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        setWidgetLayoutResource(R.layout.preference_widget_gear_no_bg);
+    }
+
+    public SingleTargetGearPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, 0 /* defStyleRes */);
+    }
+
+    public SingleTargetGearPreference(Context context, AttributeSet attrs) {
+        this(context, attrs, TypedArrayUtils.getAttr(context, R.attr.preferenceStyle,
+                android.R.attr.preferenceStyle));
+    }
+
+    public SingleTargetGearPreference(Context context) {
+        this(context, null /* attrs */);
+    }
+}