SystemUI: Refactort CMCC requirements

As Android has made a large refactor on signal bar,
CMCC requirement features are lost, so refactor these
feactures based on previous implementation
On CMCC mode:
1.Always show network type icon
2.Show G icon when network type is NETWORK_TYPE_CDMA or
NETWORK_TYPE_1xRTT
3.Show rsrp as signal strength for LTE
4.Show single signal bar instead of dual bar for CT sim card.

Change-Id: I75d7f4b2bee7aaf6120e7f62d06d8fb86645a282
CRs-Fixed: 2232319