Telephony: Support for LTE network modes

Change-Id: I8833fe3e56c94303f05111a94433b1b9e6568d2f
Telephony: Add getLteOnGsmMode() method (2/2)

Same functionality as the existing getLteOnCdmaMode, but for GSM
LTE devices.
Enable with the telephony.lteOnGsmDevice system property

From CM 10.0: Ibfb47ca608e51393b99d3308e0a6c66050b3f32e
- Moved getLteOnGsmModeStatic() to TelephonyManager.
core and telephony: Additional HSPAP support

Change-Id: I5e921d2308d873678d6ef67a91cff50d383a176b
Merge remote-tracking branch 'aosp/jb-mr1.1-release' into HEAD
Merge remote-tracking branch 'pa/jellybean' into jb42