Add Slices Data object and DB Contract

Add in a Data object used to represent one row
in a new SQLite database used for building Slices.

The database has the following schema:
- Key
- Title
- Subtitle
- Screentitle
- Icon
- Fragment
- Controller

The key is the preference key.
Title, subtitle and Icon are for UI info.
Screentitle and fragment are for the intent.
Controller is used to get dynamic ui info (like summary),
and to take actions on the slice (like a toggle).

The actual indexing and a Slice will be handled in a subsquent CL,
but a prototype can be found here: ag/3324435

Test: robotests
Bug: 67996923
Change-Id: Id91deb58a3ab89ce1dab5a3f34cdb9ade6263aa8

src/com/android/settings/slices/SettingsSliceProvider.java

@@ -0,0 +1,112 @@
+/*
+ * 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.slices;
+
+import android.app.PendingIntent;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.drawable.Icon;
+import android.net.Uri;
+import android.net.wifi.WifiManager;
+
+import com.android.settings.R;
+
+import androidx.app.slice.Slice;
+import androidx.app.slice.SliceProvider;
+import androidx.app.slice.builders.ListBuilder;
+
+public class SettingsSliceProvider extends SliceProvider {
+    public static final String SLICE_AUTHORITY = "com.android.settings.slices";
+
+    public static final String PATH_WIFI = "wifi";
+    public static final String ACTION_WIFI_CHANGED =
+            "com.android.settings.slice.action.WIFI_CHANGED";
+
+    // TODO -- Associate slice URI with search result instead of separate hardcoded thing
+    public static Uri getUri(String path) {
+        return new Uri.Builder()
+                .scheme(ContentResolver.SCHEME_CONTENT)
+                .authority(SLICE_AUTHORITY)
+                .appendPath(path).build();
+    }
+
+    @Override
+    public boolean onCreateSliceProvider() {
+        return true;
+    }
+
+    @Override
+    public Slice onBindSlice(Uri sliceUri) {
+        String path = sliceUri.getPath();
+        switch (path) {
+            case "/" + PATH_WIFI:
+                return createWifiSlice(sliceUri);
+        }
+        throw new IllegalArgumentException("Unrecognized slice uri: " + sliceUri);
+    }
+
+
+    // TODO (b/70622039) remove this when the proper wifi slice is enabled.
+    private Slice createWifiSlice(Uri sliceUri) {
+        // Get wifi state
+        WifiManager wifiManager = (WifiManager) getContext().getSystemService(Context.WIFI_SERVICE);
+        int wifiState = wifiManager.getWifiState();
+        boolean wifiEnabled = false;
+        String state;
+        switch (wifiState) {
+            case WifiManager.WIFI_STATE_DISABLED:
+            case WifiManager.WIFI_STATE_DISABLING:
+                state = getContext().getString(R.string.disconnected);
+                break;
+            case WifiManager.WIFI_STATE_ENABLED:
+            case WifiManager.WIFI_STATE_ENABLING:
+                state = wifiManager.getConnectionInfo().getSSID();
+                wifiEnabled = true;
+                break;
+            case WifiManager.WIFI_STATE_UNKNOWN:
+            default:
+                state = ""; // just don't show anything?
+                break;
+        }
+
+        boolean finalWifiEnabled = wifiEnabled;
+        return new ListBuilder(sliceUri)
+                .setColor(R.color.material_blue_500)
+                .add(b -> b
+                        .setTitle(getContext().getString(R.string.wifi_settings))
+                        .setTitleItem(Icon.createWithResource(getContext(), R.drawable.wifi_signal))
+                        .setSubtitle(state)
+                        .addToggle(getBroadcastIntent(ACTION_WIFI_CHANGED), finalWifiEnabled)
+                        .setContentIntent(getIntent(Intent.ACTION_MAIN)))
+                .build();
+    }
+
+    private PendingIntent getIntent(String action) {
+        Intent intent = new Intent(action);
+        PendingIntent pi = PendingIntent.getActivity(getContext(), 0, intent, 0);
+        return pi;
+    }
+
+    private PendingIntent getBroadcastIntent(String action) {
+        Intent intent = new Intent(action);
+        intent.setClass(getContext(), SliceBroadcastReceiver.class);
+        return PendingIntent.getBroadcast(getContext(), 0, intent,
+                PendingIntent.FLAG_CANCEL_CURRENT);
+    }
+}