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
Framework: Use the proper context when creating Bug report dialog

Change-Id: I0dfa96db1d8857207a7871f846126121331a633c
SystemUI: Open Quick Settings panel if there are no active notifications

This is ported from AOKP and described as follows:

  If there are no notifications that belong to the current user, then automatically
  open the quick settings menu (like the two-finger open). It only ignores the ADB
  icon for now (which is pretty useless) but could be extended to ignore the usb
  mounting one or maybe another?
  Author: Roman Birg <romanbirg@gmail.com> AOKP
  AOKP Github: commit 2eb664a4bc5f93b705eeeaa0847331343bb017cd

The CM version of the commit respects the Power widget enabled settings and will
only display this behaviour if the Power widget is disabled.

Change-Id: Ie0c22167ebc6fd3152335c4148dbb7c65bfce46f
SystemUI: Tweak number of notifications detection method

Change-Id: Ibd46fa5039e1d3062dcdb8f3c4dbd9ec1bdc73b0
QuickSettings: New icons better matching stock

There icons should match the stock feel a bit better
in terms of size, design and color.

Change-Id: I1c8e6af9e48569e1c227c081495f70607cfe6d2b