GsmSS: Use data tech in isConcurrentVoiceAndDataAllowed

Voice technology is not properly supported in older RILs

When using RIL blobs, the value would be set to UNKNOWN,
resulting in data being disconnecting during call despite
being on 3G.

When using source-built RIL, the value would be set to
UMTS regardless of 2G/3G status. (At least from reading
the source.)

Change-Id: I12738abc1736165e92aa7f4530ca043cc1acc44d
Properly handle a null URI.

Change-Id: Ic144986f6935e9a2df0073869a6a8b4e863a6128
JIRA:CYAN-2491
Fix cdma data calls based on NV

For NV data calls we need to create dummy profiles
When DcTracker switches from lte to cdma we need to bring
down existing data call and establish new one (same goes
for switching cdma->lte)

Bug: 10804691
Change-Id: I7ad8d0632854ea9875afb76709c1ba894bf048fd
(cherry picked from commit 4ead798ed4964952c3086b3224d775479d66d240)
(cherry picked from commit f333f0ca7b1c992ab36af83ca74a1131d3ae17b8)
(cherry picked from commit 14e5657432de2eb9ba52ebf28a8967ed62ee4a0b)