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/Settings.java

@@ -128,6 +128,7 @@ public class Settings extends SettingsActivity {
     public static class AppMemoryUsageActivity extends SettingsActivity { /* empty */ }
     public static class OverlaySettingsActivity extends SettingsActivity { /* empty */ }
     public static class WriteSettingsActivity extends SettingsActivity { /* empty */ }
+    public static class ChangeWifiStateActivity extends SettingsActivity { /* empty */ }
     public static class AppDrawOverlaySettingsActivity extends SettingsActivity { /* empty */ }
     public static class AppWriteSettingsActivity extends SettingsActivity { /* empty */ }
     public static class AdvancedAppsActivity extends SettingsActivity { /* empty */ }