Revert "Remove telephony support for car builds."

This reverts commit 77c76ee2231ae66bbfbef63cdbcfd4738cc42f24.

Reason for revert: this can be disabled per device level rather than disable globally for all auto devices.

Bug: 133877437
Change-Id: Iff72d738f92e41184189db94b283181fc72f2334
diff --git a/car_product/build/car.mk b/car_product/build/car.mk
index d170e8a..999bbff 100644
--- a/car_product/build/car.mk
+++ b/car_product/build/car.mk
@@ -57,8 +57,6 @@
     ro.fw.mu.headless_system_user=true \
     config.disable_systemtextclassifier=true
 
-TARGET_NO_TELEPHONY := true
-
 # Overlay for Google network and fused location providers
 $(call inherit-product, device/sample/products/location_overlay.mk)
 $(call inherit-product-if-exists, frameworks/base/data/fonts/fonts.mk)