Support additional LTE network modes

- Support all LTE network modes defined in RILConstants and
  com.android.internal.telephony.Phone.
- Enable LTE options for GSM LTE phones.
- Implement toggleLTE.
  - LTE/CDMA mode may be overridden with toggleLTE_lte_cdma_nt_mode.

Consists of (partial) cherry-picks of these CM 10.0 commits:

commit a8eb4dce7b19bfa74fbbde128336f93057133d97
Author: Mike Kasick <mike@kasick.org>
Date:   Fri Aug 10 18:04:44 2012 -0400

    Make "Preferred network mode" strings consistent, fix LTE modes.

    - Make network mode strings, comments, internally consistent with each other.
    - Show LTE modes only for CDMA/LTE and GSM/LTE devices, not non-LTE.
    - Revert to "Global" label for NETWORK_MODE_GLOBAL on non-LTE devices, to
      remain consistent with RILConstants, but also because this mode is used
      for CDMA/EvDo/GSM/WCDMA mode on global-capable devices.
    - Consistently show "CDMA / EvDo" whether on a CDMA or CDMA/LTE phone.

    This should be the complete superset of network modes supported on all
    devices.  Individual devices may prune this list to include only network
    modes that their radios support.

    Note, the "Global" mode label (preferred_network_mode_lte_cdma_summary)
    remains unchanged from its overloaded-to-support-LTE-on-toro capacity for
    consistency with AOSP, although though this overloading is a mess.

    Change-Id: I39bcf73474778a4d83753eddb5014642e41ab9b3

commit 9025baeddf9b7325e07605fca310fa897dcd9175
Author: dhacker29 <davidhackerdvm@gmail.com>
Date:   Tue Jul 10 10:59:01 2012 -0500

    Add NT_MODE's for NETWORK_MODE's 8 and 10

    as defined in RILConstants.java

    Change-Id: I225bb776152e4c63ade1f70669edb2df3986634c

commit a03ba4f3ea1c059d91aba747964314ab657d6842
Author: Ricardo Cerqueira <github@cerqueira.org>
Date:   Tue Apr 17 01:34:31 2012 +0100

    Phone: Enable LTE options for GSM LTE phones

    Change-Id: I580c37f3272c8cc8363e8db5b1c227bf6f74a04a

Change-Id: I326584e1f82cc84c244c23282b096a98703d4b1a
Remove hard-coded CDMA roaming mode restrictions.

Prior to this, the CDMA roaming mode (from the "System select" setting) is
vetted against a hard-coded list of two acceptable values (CDMA_RM_HOME:0
and CDMA_RM_ANY:2).  This commit instead vets against the
cdma_system_select_values list, which contains those two values by default,
but may be overridden on a per-device basis.

For motivation, epicmtd in stock Gingerbread doesn't use CDMA_RM_ANY:2, but
values 5-8 to select between automatic domestic, international, both, and
no roaming.  Without this, roaming is unintentionally disabled anytime the
"Mobile networks" setting screen is opened.

From CM9: I589c660fe3a1b9920cecfc7e6dc044f3f722fbb2

Change-Id: I6611822822f32cd132a1794e7ca11bf5f751994d
Port network mode toggle from CM10

	commit 43575664b23d2ea1766210cea99f184e1732860b
	Author: Ricardo Cerqueira <github@cerqueira.org>
	Date:   Fri Apr 27 17:39:37 2012 +0100

	    PhoneToggler: Fix toggler on LTE+GSM phones

	    NT_MODE_LTE_GSM_WCDMA was missing from the lists of acceptable
	    network modes

	    Change-Id: I6c3c38d63902c1c59cfa2e61ed5d8bcdd5bcb5f0

	commit d1dc25f1b37fca42ce2834fe3bb3217800422f7e
	Author: Emerson Pinter <dev@pinter.com.br>
	Date:   Sat Feb 18 22:02:22 2012 -0200

	Makes network mode toggle work. Port from CM9.

	Added LTE_ONLY needed code to PhoneToggler.
	Added LTE to the double check MODE_GLOBAL condition on Settings and
	PhoneToggler.

	Integrated patch by Danny Baumann to make PhoneToggler accept the same
	values as are configurable in settings, from change:
	http://review.cyanogenmod.com/#change,14120

	Tested-by: Emerson Pinter
	Signed-off-by: Emerson Pinter <dev@pinter.com.br>

	*** Settings.java and PhoneToggler.java original authors:

	commit 3e6b2ca4c969aedeefa9a10bb85e9c52bc43a574
	Author: Emilio López <turl@tuxfamily.org>
	Date:   Wed Sep 14 23:50:06 2011 +0000

	    Phone: Double check mode before changing, part 2

	    A modem might report world phone mode when it really is only GSM or
	    CDMA capable, making the system switch to an invalid mode which
	    will later break the telephony code.
	    This simple check enforces the world phone overlay which is already
	    in place and will only consider it a correct value in that case.

	    This complements a commit with the same title by applying the same
	    logic to another code path that uses similar checks.

	    Change-Id: Ib7332511a693d40f53a79ba98844c9117871228a

	commit 19215c8f614e30211b2aca1512bb8444da55bdda
	Author: Emilio López <turl@tuxfamily.org>
	Date:   Wed Sep 14 23:50:06 2011 +0000

	    Phone: Double check mode before changing

	    A modem might report world phone mode when it really is only GSM or
	    CDMA capable, making the system switch to an invalid mode which
	    will later break the telephony code.
	    This simple check enforces the world phone overlay which is already
	    in place and will only consider it a correct value in that case.

	    Change-Id: Iedbc529497b2779f3a12ff56ca1b028cc9434227

	commit 0d396f79514173e06c5334a40f23090933e0a806
	Author: piaf <piaf@mediacenter-desktop.(none)>
	Date:   Tue Aug 3 00:56:09 2010 +0100

	    Added permission control for the 2G/3G switch

	commit 5c85d5417a67b02be895a8878c7fa86bc992cd8e
	Author: Mediacenter <mediacenter@mediacenter-desktop.(none)>
	Date:   Sat Jul 31 01:45:03 2010 +0100

	    Added support for Changing Phone network mode
	    Todo: Add permission control

	Change-Id: I84db8082b4e35262f1c6cdb8d1156f3cbf997a99

Change-Id: Ibb8f33db71224b4559dcbf377c5844edc88548a7

Conflicts:

	res/values-de/strings.xml
	res/values/strings.xml