Migrate ChooseAccountActivity to DashboardFragment

- Build a controller to generate/manage a list of preferences.
- Move some logics to the controller and add tests.
- Rename to ChooseAccountFragment.

Bug: 73899467
Test: make RunSettingsRoboTests -j
      atest UniquePreferenceTest SettingsGatewayTest
Change-Id: Id2906c4b922ef159d08c803b976671264c54665f

src/com/android/settings/accounts/EnterpriseDisclosurePreferenceController.java

@@ -0,0 +1,79 @@
+/*
+ * 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.accounts;
+
+import android.content.Context;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.enterprise.EnterprisePrivacyFeatureProvider;
+import com.android.settings.overlay.FeatureFactory;
+import com.android.settingslib.widget.FooterPreference;
+import com.android.settingslib.widget.FooterPreferenceMixin;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.preference.PreferenceScreen;
+
+public class EnterpriseDisclosurePreferenceController extends BasePreferenceController {
+
+    private final EnterprisePrivacyFeatureProvider mFeatureProvider;
+    private FooterPreferenceMixin mFooterPreferenceMixin;
+    private PreferenceScreen mScreen;
+
+    public EnterpriseDisclosurePreferenceController(Context context) {
+        // Preference key doesn't matter as we are creating the preference in code.
+        super(context, "add_account_enterprise_disclosure_footer");
+
+        mFeatureProvider = FeatureFactory.getFactory(mContext)
+                .getEnterprisePrivacyFeatureProvider(mContext);
+    }
+
+    public void setFooterPreferenceMixin(FooterPreferenceMixin footerPreferenceMixin) {
+        mFooterPreferenceMixin = footerPreferenceMixin;
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (getDisclosure() == null) {
+            return DISABLED_UNSUPPORTED;
+        }
+        return AVAILABLE;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mScreen = screen;
+        addEnterpriseDisclosure();
+    }
+
+    @VisibleForTesting
+    CharSequence getDisclosure() {
+        return mFeatureProvider.getDeviceOwnerDisclosure();
+    }
+
+    private void addEnterpriseDisclosure() {
+        final CharSequence disclosure = getDisclosure();
+        if (disclosure == null) {
+            return;
+        }
+        final FooterPreference enterpriseDisclosurePreference =
+                mFooterPreferenceMixin.createFooterPreference();
+        enterpriseDisclosurePreference.setSelectable(false);
+        enterpriseDisclosurePreference.setTitle(disclosure);
+        mScreen.addPreference(enterpriseDisclosurePreference);
+    }
+}