Enable ONS auto provisioning using device config

Bug: 229727068
Test: Manual. Flash the device with the binary including this change and check adb logs. ERR_AUTO_PROVISIONING_DISABLED should not be printed.
Change-Id: I826f86c9943573d25ffeb1ac9761a29c03bf4cc9

cheetah/overlay/packages/services/AlternativeNetworkAccess/res/values/config.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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.
+-->
+<resources>
+  <bool name="enable_ons_auto_provisioning">true</bool>
+</resources>

panther/overlay/packages/services/AlternativeNetworkAccess/res/values/config.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 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.
+-->
+<resources>
+  <bool name="enable_ons_auto_provisioning">true</bool>
+</resources>