Revert "[2/3] opt/telephony: Add Network Tiles"

This reverts commit b59e354ae4b61afcb2607dade7b1353ea46ee134.
Revert "Revert "Telephony: Add getLteOnGsmMode() method (2/2)""

This reverts commit db975ddcfd5d4124ea9c788f155231c889235440.