Add controllers for default app shortcut preferences.

For AppInfoDashboardFragment:
- add the default app shortcut preferences into the preference screen
instead of creating them dynamically.
- add controller for each of the shortcut preference.

Bug: 69384089
Test: make RunSettingsRoboTests
Change-Id: I1e81944a3bc867fd6a3a0d484bab77c3ad0e6441

src/com/android/settings/applications/appinfo/DefaultAppShortcutPreferenceControllerBase.java

@@ -0,0 +1,87 @@
+/*
+ * 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.applications.appinfo;
+
+import android.app.slice.Slice;
+import android.content.Context;
+import android.os.Bundle;
+import android.os.UserManager;
+import android.support.v7.preference.Preference;
+import android.text.TextUtils;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.SettingsActivity;
+import com.android.settings.Utils;
+import com.android.settings.applications.DefaultAppSettings;
+import com.android.settings.core.BasePreferenceController;
+
+/*
+ * Abstract base controller for the default app shortcut preferences that launches the default app
+ * settings with the corresponding default app highlighted.
+ */
+public abstract class DefaultAppShortcutPreferenceControllerBase extends BasePreferenceController {
+
+    protected final String mPackageName;
+
+    public DefaultAppShortcutPreferenceControllerBase(Context context, String preferenceKey,
+            String packageName) {
+        super(context, preferenceKey);
+        mPackageName = packageName;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (UserManager.get(mContext).isManagedProfile()) {
+            return DISABLED_FOR_USER;
+        }
+        return hasAppCapability() ? AVAILABLE : DISABLED_UNSUPPORTED;
+    }
+
+    @Override
+    public Slice getSettingSlice() {
+        return null;
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        preference.setSummary(isDefaultApp() ? R.string.yes : R.string.no);
+    }
+
+    @Override
+    public boolean handlePreferenceTreeClick(Preference preference) {
+        if (TextUtils.equals(mPreferenceKey, preference.getKey())) {
+            Bundle bundle = new Bundle();
+            bundle.putString(SettingsActivity.EXTRA_FRAGMENT_ARG_KEY, mPreferenceKey);
+            Utils.startWithFragment(mContext, DefaultAppSettings.class.getName(), bundle, null, 0,
+                    R.string.configure_apps, null, MetricsProto.MetricsEvent.VIEW_UNKNOWN);
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Check whether the app has the default app capability
+     * @return true if the app has the default app capability
+     */
+    protected abstract boolean hasAppCapability();
+
+    /**
+     * Check whether the app is the default app
+     * @return true if the app is the default app
+     */
+    protected abstract boolean isDefaultApp();
+
+}