Adding Wifi setting to special_access settings

In the settings app, allow users to override app permission for
CHANGE_WIFI_STATE for every application that declared that permission.

Bug: 70562620
Test: compile, robotests

Manual test:
Flash build to device (walleye)
Download iPass from playstore
Open iPass and try connect to a wifi network; verify success
Open settings -> Apps & notifications -> Advanced -> Special app access
-> Wifi access
Select iPass from the list
Toggle the switch to off
Open iPass and try connect to a wifi network; verify failure

Change-Id: Ib2be4c83988a81ba7831d096c9b1980462e66903

src/com/android/settings/wifi/AppStateChangeWifiStateBridge.java

@@ -0,0 +1,92 @@
+/*
+ * 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.wifi;
+
+import android.Manifest;
+import android.app.AppOpsManager;
+import android.content.Context;
+
+import com.android.settings.applications.AppStateAppOpsBridge;
+import com.android.settings.applications.AppStateAppOpsBridge.PermissionState;
+import com.android.settingslib.applications.ApplicationsState;
+import com.android.settingslib.applications.ApplicationsState.AppEntry;
+import com.android.settingslib.applications.ApplicationsState.AppFilter;
+
+import java.util.List;
+/*
+ * Connects info of apps that change wifi state to the ApplicationsState. Wraps around the generic
+ * AppStateAppOpsBridge class to tailor to the semantics of CHANGE_WIFI_STATE. Also provides app
+ * filters that can use the info.
+ */
+public class AppStateChangeWifiStateBridge extends AppStateAppOpsBridge {
+
+    private static final String TAG = "AppStateChangeWifiStateBridge";
+    private static final int APP_OPS_OP_CODE = AppOpsManager.OP_CHANGE_WIFI_STATE;
+    private static final String PM_CHANGE_WIFI_STATE = Manifest.permission.CHANGE_WIFI_STATE;
+
+    private static final String[] PM_PERMISSIONS = {
+            PM_CHANGE_WIFI_STATE
+    };
+
+    public AppStateChangeWifiStateBridge(Context context, ApplicationsState appState, Callback
+            callback) {
+        super(context, appState, callback, APP_OPS_OP_CODE, PM_PERMISSIONS);
+    }
+
+    @Override
+    protected void updateExtraInfo(AppEntry app, String pkg, int uid) {
+        app.extraInfo = getWifiSettingsInfo(pkg, uid);
+    }
+
+    @Override
+    protected void loadAllExtraInfo() {
+        final List<AppEntry> allApps = mAppSession.getAllApps();
+        for (AppEntry entry : allApps) {
+            updateExtraInfo(entry, entry.info.packageName, entry.info.uid);
+        }
+    }
+
+    public WifiSettingsState getWifiSettingsInfo(String pkg, int uid) {
+        PermissionState permissionState = super.getPermissionInfo(pkg, uid);
+        return new WifiSettingsState(permissionState);
+    }
+
+    public static class WifiSettingsState extends AppStateAppOpsBridge.PermissionState {
+        public WifiSettingsState(PermissionState permissionState) {
+            super(permissionState.packageName, permissionState.userHandle);
+            this.packageInfo = permissionState.packageInfo;
+            this.appOpMode = permissionState.appOpMode;
+            this.permissionDeclared = permissionState.permissionDeclared;
+            this.staticPermissionGranted = permissionState.staticPermissionGranted;
+        }
+    }
+
+    public static final AppFilter FILTER_CHANGE_WIFI_STATE = new AppFilter() {
+        @Override
+        public void init() {
+        }
+
+        @Override
+        public boolean filterApp(AppEntry info) {
+            if (info == null || info.extraInfo == null) {
+                return false;
+            }
+            WifiSettingsState wifiSettingsState = (WifiSettingsState) info.extraInfo;
+            return wifiSettingsState.permissionDeclared;
+        }
+    };
+}