Revert "Remove Permissions Hub."

This reverts commit 1e7c172ad5.

Bug: 132292477
Test: None.
Change-Id: Icae2cd4edbb22e2f3ea72e20f0ebd818f1ac6629

src/com/android/settings/Utils.java

@@ -130,6 +130,11 @@ public final class Utils extends com.android.settingslib.Utils {
     public static final String PROPERTY_DEVICE_IDENTIFIER_ACCESS_RESTRICTIONS_DISABLED =
             "device_identifier_access_restrictions_disabled";
 
+    /**
+     * Whether to show the Permissions Hub.
+     */
+    public static final String PROPERTY_PERMISSIONS_HUB_ENABLED = "permissions_hub_enabled";
+
     /**
      * Finds a matching activity for a preference's intent. If a matching
      * activity is not found, it will remove the preference.

src/com/android/settings/location/RecentLocationAccessPreferenceController.java

@@ -64,7 +64,9 @@ public class RecentLocationAccessPreferenceController extends AbstractPreference
 
     @Override
     public boolean isAvailable() {
-        return false;
+        return Boolean.parseBoolean(
+                DeviceConfig.getProperty(DeviceConfig.NAMESPACE_PRIVACY,
+                        Utils.PROPERTY_PERMISSIONS_HUB_ENABLED));
     }
 
     @Override

src/com/android/settings/privacy/PermissionBarChartPreferenceController.java

@@ -89,7 +89,10 @@ public class PermissionBarChartPreferenceController extends BasePreferenceContro
 
     @Override
     public int getAvailabilityStatus() {
-        return UNSUPPORTED_ON_DEVICE;
+        return Boolean.parseBoolean(
+                DeviceConfig.getProperty(DeviceConfig.NAMESPACE_PRIVACY,
+                        com.android.settings.Utils.PROPERTY_PERMISSIONS_HUB_ENABLED)) ?
+                AVAILABLE_UNSEARCHABLE : UNSUPPORTED_ON_DEVICE;
     }
 
     @Override