PowerWidget: Re-enable LTE button.

- Implement toggleLTE,
  from CM 10.0: I3f7521f5ec4e9f9106c58afd4d5b10c7086b55fd.
- Support all LTE network modes defined in RILConstants and
  com.android.internal.telephony.Phone.
- Cleanup: Remove unused LTE_MODE, restrict state change to updateState.
- Also use Settings.Global.getInt() for PREFERRED_NETWORK_MODE.

Change-Id: I43bb2491d650d641d243d3cb67ee80bc7c8f5cdf
PowerWidget: fix airplane mode toggle

Settings.System -> Settings.Global

Change-Id: Ic1a874ec694e76153d0838fdb81650fe384bae59
PowerWidget: Soundbutton bugfix

PatchSet1: Initial commit

PatchSet2: fix whitespace errors

PatchSet3: DERB!!!!!

PatchSet4: Buttons are working correctly now.

PatchSet5: whitspace errors --> I HATE VIM; need to set up Eclipse

Change-Id: Ic0d9714c82734e9afac843995bd16d09736f85cf

Conflicts:
	packages/SystemUI/src/com/android/systemui/quicksettings/RingerModeTile.java
Fix mobile data button in power widget.

Change-Id: Ide0417768350081250af24518b6831d70196ba73
JIRA:CYAN-1189