Load suggestions through SettingsIntelligence.

- Add flag to switch between old/new implementation
- Add SuggestionLoader to load using Loader (instead of AsyncTask)
- Update DashboardAdapater/SuggestionAdapter to take List<Suggestion>
- Marked old getter/setters as @Deprecated and added comment
- Update tests to cover suggestionV2 adapter changes.

TODO:
- Handler for dismissing suggestion not set up yet.
- Suggestion data structure is incomplete (missing icon, remote view, etc)
- Need to extend Suggestion data strcture to support icon and
  remote view binding

Bug: 65065268
Test: robotests
Change-Id: I2378ef4c9edee972d5de93c3868068e2cde23f56

src/com/android/settings/dashboard/suggestions/SuggestionLoader.java

@@ -0,0 +1,54 @@
+/*
+ * 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.dashboard.suggestions;
+
+import android.content.Context;
+import android.service.settings.suggestions.Suggestion;
+import android.util.Log;
+
+import com.android.settings.utils.AsyncLoader;
+
+import java.util.List;
+
+public class SuggestionLoader extends AsyncLoader<List<Suggestion>> {
+
+    public static final int LOADER_ID_SUGGESTIONS = 42;
+    private static final String TAG = "SuggestionLoader";
+
+    private final SuggestionController mSuggestionController;
+
+    public SuggestionLoader(Context context, SuggestionController controller) {
+        super(context);
+        mSuggestionController = controller;
+    }
+
+    @Override
+    protected void onDiscardResult(List<Suggestion> result) {
+
+    }
+
+    @Override
+    public List<Suggestion> loadInBackground() {
+        final List<Suggestion> data = mSuggestionController.getSuggestions();
+        if (data == null) {
+            Log.d(TAG, "data is null");
+        } else {
+            Log.d(TAG, "data size " + data.size());
+        }
+        return data;
+    }
+}