Telephony: Add TD-SCDMA network modes

1)TD-SCDMA Signal Strength support.
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.
3) Add TD-SCDMA to the list of supported network modes.

Change-Id: I158821574484bfaf47d1660406e591e2afb3be5e
CRs-Fixed: 403258, 479310
(cherry picked from commit 2ba1b7292c6b458fb72587c1f29a5c00b70717cd)
(cherry picked from commit d58b065e7e3d84461a3c981e7a7d4673f3567ef5)
(cherry picked from commit 7844d69d3d323b3969766309c2ad5bc80411fbae)

Conflicts:
	telephony/java/android/telephony/TelephonyManager.java
QS: Add TD-SCDMA support to the LTE toggle tile

Recognize TD-SDCDMA LTE modes as valid LTE to light up the tile.

While I'm at it, remove the network checks from the actual toggle
action, since TelephonyManager now ignores the boolean argument
and always toggles, making the checks pointless.

Change-Id: I8e0020def1f091a6fef9dce4d9700478a826e9a3
Fix Weather View update