Add auto restriction preference

1. Add method in feature provider to check whether smart battery
is supported
2. Hook up above method to controllers
3. Add auto restriction preference
4. Add tests

Bug: 73002171
Test: RunSettingsRoboTests
Change-Id: Ic314f61ad52e9bedb629b308731cb968bb4b1773

src/com/android/settings/fuelgauge/SmartBatteryPreferenceController.java

@@ -19,12 +19,11 @@ package com.android.settings.fuelgauge;
 
 import android.content.Context;
 import android.provider.Settings;
-import android.support.annotation.VisibleForTesting;
 import android.support.v14.preference.SwitchPreference;
 import android.support.v7.preference.Preference;
 
-import com.android.settings.applications.LayoutPreference;
 import com.android.settings.core.BasePreferenceController;
+import com.android.settings.overlay.FeatureFactory;
 
 /**
  * Controller to change and update the smart battery toggle
@@ -34,15 +33,19 @@ public class SmartBatteryPreferenceController extends BasePreferenceController i
     private static final String KEY_SMART_BATTERY = "smart_battery";
     private static final int ON = 1;
     private static final int OFF = 0;
+    private PowerUsageFeatureProvider mPowerUsageFeatureProvider;
 
     public SmartBatteryPreferenceController(Context context) {
         super(context, KEY_SMART_BATTERY);
+        mPowerUsageFeatureProvider = FeatureFactory.getFactory(context)
+                .getPowerUsageFeatureProvider(context);
     }
 
     @Override
     public int getAvailabilityStatus() {
-        // TODO(b/71502850): get Availability from API. The device may not support it.
-        return AVAILABLE;
+        return mPowerUsageFeatureProvider.isSmartBatterySupported()
+                ? AVAILABLE
+                : DISABLED_UNSUPPORTED;
     }
 
     @Override