Telephony: Add TD-SCDMA support

Add network mode TD-SCDMA to the list
of supported network modes.
CRs-Fixed: 479310

Change-Id: Iad1f0ad424a8cc2b57df28caa3cea1c3c4c2f134
Fix TD signal

Change-Id: I132d0d55dc3668f55dfae00f5d0d052ef2f0dc68