overlay: disable voice & sms capability

Disabling voice & sms capability as only 3G & LTE model have ability to do that

device.mk

@@ -17,6 +17,9 @@
 
 $(call inherit-product, $(SRC_TARGET_DIR)/product/languages_full.mk)
 
+# Overlays
+DEVICE_PACKAGE_OVERLAYS += $(LOCAL_PATH)/overlay
+
 # System properties
 PRODUCT_PROPERTY_OVERRIDES += \
     ro.carrier=wifi-only \

overlay/frameworks/base/core/res/res/values/config.xml

@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+/*
+** Copyright 2011, The Android Open Source Project
+** Copyright 2017-2019, The LineageOS 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.
+*/
+-->
+
+<!-- These resources are around just to allow their values to be customized
+     for different hardware and product builds. -->
+<resources>
+
+    <!-- Flag indicating whether the current device allows sms service.
+         If true, this means that the device supports both sending and
+         receiving sms via the telephony network.
+         This can be overridden to false for "data only" devices
+         which can't send and receive sms message.
+
+         Note: Disable SMS also disable voicemail waiting sms,
+               cell broadcasting sms, and MMS. -->
+    <bool name="config_sms_capable">false</bool>
+
+    <!-- Flag indicating whether the current device is "voice capable".
+         If true, this means that the device supports circuit-switched
+         (i.e. voice) phone calls over the telephony network, and is
+         allowed to display the in-call UI while a cellular voice call is
+         active.  This can be overridden to false for "data only" devices
+         which can't make voice calls and don't support any in-call UI.
+
+         Note: this flag is subtly different from the
+         PackageManager.FEATURE_TELEPHONY system feature, which is
+         available on *any* device with a telephony radio, even if the
+         device is data-only. -->
+    <bool name="config_voice_capable">false</bool>
+
+</resources>