Disables the Gesture nav option if 3P launcher is default

Disables the Gesture navigation radio button if 3P launcher is set as
default for current user. Also shows an info icon on the right side that
opens a dialog explaining why it is disables.

Bug: 129532605
Test: Manual test with 3P launcher
Test: make RunSettingsRoboTests ROBOTEST_FILTER=RadioButtonPreferenceWithExtraWidgetTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=SystemNavigationGestureSettingsTest
Test: make RunSettingsRoboTests ROBOTEST_FILTER=SystemNavigationPreferenceControllerTest

Change-Id: I90000c74246699fa9391ac042c87d7f0ece03637

tests/robotests/src/com/android/settings/widget/RadioButtonPreferenceWithExtraWidgetTest.java

@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2019 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 static com.android.settings.widget.RadioButtonPreferenceWithExtraWidget.EXTRA_WIDGET_VISIBILITY_GONE;
+import static com.android.settings.widget.RadioButtonPreferenceWithExtraWidget.EXTRA_WIDGET_VISIBILITY_INFO;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertEquals;
+
+import android.app.Application;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.preference.PreferenceViewHolder;
+
+import com.android.settings.R;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+import org.robolectric.RuntimeEnvironment;
+
+@RunWith(RobolectricTestRunner.class)
+public class RadioButtonPreferenceWithExtraWidgetTest {
+
+    private Application mContext;
+    private RadioButtonPreferenceWithExtraWidget mPreference;
+
+    private TextView mSummary;
+    private ImageView mExtraWidget;
+    private View mExtraWidgetDivider;
+
+    private boolean mIsClickListenerCalled = false;
+    private View.OnClickListener mClickListener = new View.OnClickListener() {
+        @Override
+        public void onClick(View v) {
+            mIsClickListenerCalled = true;
+        }
+    };
+
+    @Before
+    public void setUp() {
+        mContext = RuntimeEnvironment.application;
+        mPreference = new RadioButtonPreferenceWithExtraWidget(mContext);
+        mPreference.setSummary("test summary");
+
+        View view = LayoutInflater.from(mContext)
+                .inflate(R.layout.preference_radio_with_extra_widget, null);
+        PreferenceViewHolder preferenceViewHolder =
+                PreferenceViewHolder.createInstanceForTests(view);
+        mPreference.onBindViewHolder(preferenceViewHolder);
+
+        mSummary = view.findViewById(android.R.id.summary);
+        mExtraWidget = view.findViewById(R.id.radio_extra_widget);
+        mExtraWidgetDivider = view.findViewById(R.id.radio_extra_widget_divider);
+    }
+
+    @Test
+    public void shouldHaveRadioPreferenceWithExtraWidgetLayout() {
+        assertThat(mPreference.getLayoutResource())
+                .isEqualTo(R.layout.preference_radio_with_extra_widget);
+    }
+
+    @Test
+    public void iconSpaceReservedShouldBeFalse() {
+        assertThat(mPreference.isIconSpaceReserved()).isFalse();
+    }
+
+    @Test
+    public void summaryShouldBeVisible() {
+        assertEquals(View.VISIBLE, mSummary.getVisibility());
+    }
+
+    @Test
+    public void testSetExtraWidgetVisibility_gone() {
+        mPreference.setExtraWidgetVisibility(EXTRA_WIDGET_VISIBILITY_GONE);
+        assertEquals(View.GONE, mExtraWidget.getVisibility());
+        assertEquals(View.GONE, mExtraWidgetDivider.getVisibility());
+        assertThat(mExtraWidget.isClickable()).isFalse();
+    }
+
+    @Test
+    public void testSetExtraWidgetVisibility_info() {
+        mPreference.setExtraWidgetVisibility(EXTRA_WIDGET_VISIBILITY_INFO);
+        assertEquals(View.VISIBLE, mExtraWidget.getVisibility());
+        assertEquals(View.VISIBLE, mExtraWidgetDivider.getVisibility());
+        assertThat(mExtraWidget.isClickable()).isTrue();
+    }
+
+    @Test
+    public void testSetExtraWidgetOnClickListener() {
+        mPreference.setExtraWidgetOnClickListener(mClickListener);
+
+        assertThat(mIsClickListenerCalled).isFalse();
+        mExtraWidget.callOnClick();
+        assertThat(mIsClickListenerCalled).isTrue();
+    }
+
+    @Test
+    public void extraWidgetStaysEnabledWhenPreferenceIsDisabled() {
+        mPreference.setEnabled(false);
+        mExtraWidget.setEnabled(false);
+
+        assertThat(mExtraWidget.isEnabled()).isFalse();
+        mPreference.setExtraWidgetOnClickListener(mClickListener);
+        assertThat(mExtraWidget.isEnabled()).isTrue();
+    }
+}