Developer settings: Disable wifi scan throttling

Add a new developer settings toggle to allow users to
toggle wifi scan throttling off.

Bug: 112825565
Test: atest com.android.settings.development
Test: Manual verification of the new switch.
Change-Id: I1d8c149305ca92957c7d1b9f28497291ca8b2bf7

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -432,6 +432,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new CameraLaserSensorPreferenceController(context));
         controllers.add(new WifiDisplayCertificationPreferenceController(context));
         controllers.add(new WifiVerboseLoggingPreferenceController(context));
+        controllers.add(new WifiScanThrottlingPreferenceController(context));
         controllers.add(new MobileDataAlwaysOnPreferenceController(context));
         controllers.add(new TetheringHardwareAccelPreferenceController(context));
         controllers.add(new BluetoothDeviceNoNamePreferenceController(context));