Frameworks: Add TD-SCDMA support

1)TD-SCDMA Signal Strength display changes.
2)Add TD-SCDMA network type support in MobileDataStateTracker class
to identify TD-SCDMA as UMTS variant and use the relevant
kernel data stack tcp buffer sizes defined.

+ Telephony: Display 3g icons for tdscdma

Updated: As per technology order & keeping in view of
future changes, add TDSCDMA case along with UMTS type.

Change-Id: I158821574484bfaf47d1660406e591e2afb3be5e
CRs-Fixed: 403258

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java
	telephony/java/android/telephony/SignalStrength.java