「DO NOT MERGE」Revert "Get ApnIpType from ConnectivityManager#getLinkProperties()"

This reverts commit 8f77e347.

Reason for revert:

1. Vendor reported a issue that after requesting EIMS network with IPv4v6 IP, we received onLinkPropertiesChanged() callback twice, where the initial callback is IPv4 link following a second callback with IPv4+IPv6 link, this behavior causes the wrong IP(IPv4) type to be sent to HAL.

2. We still can use hidden Telephony API in R, will fix above issue in S.


Bug: 158695044
Test: Emergency SUPL test
Change-Id: I1b7a4c3010c21923bda9e8dbead67215f7c600f7