[REQUEST] Add VOLTE symbol to the bar

[Joel Mathew]

VOLTE is a new protocol of Voice transmission over LTE. India's major telecom operator, Reliance Jio, and USA's T-Mobile support volte for calls, along with many other operators. The latest flagship, Oneplus 3 and many other phones support this. When phone is connected to VOLTE, a volte symbol is shown which is essential to know that one can make calls. Please add this to the mod. I will provide additional logs you need.

[ibocharov]

Yeah, it would be great if you provide me logs (could you enable logging in my module and several times enable \ disable data connection)