Make EnableFailFastRefCounter a singleton.

Since there is only one DCT the mEnableFailFastRefCounter can be a
static/singleton and thus properly refcount the
CMD_SET_ENABLE_FAIL_FAST_MOBILE_DATA. There is still one problem
and that is if the PhoneApp crashes the singleton will be reinstantiated
and we'll have the same problem, but the frequency of this is small.
Also, the consequence of this is the DCT will be behaving "normally"
in that it will be attempting to do data-stall recovery although we
might like it not to it is the "normal" behavior.

Bug: 10304904
Change-Id: I4197c4236a402aa247f775e480e747620fd189bd
Add support for a provisioning apn.

When there is a provisioning apn, such as lwaactivate from AT&T it is
not necessary nor desireble to try to make network connections as
they will be no TCP ACK's to SYN messages, except for a limited set
of operator white listed addresses.

This is implemented by adding two commands CMD_IS_PRVISIONING_APN
and CMD_ENABLE_MOBILE_PROVISIONING. These are used by ConnectivityService
CheckMp and to know when we are connected to a provisioning apn and to
turn actually bring up the connection when the user needs to provision.

Also, incorporate the sEnableFailFastRefCounter change from klp to make
a singleton and remove the RuntimeException.

Bug: 10328264
Change-Id: I3925004011bb1243793c4c1b963d923dc2b00cb5
Merge tag 'android-4.3_r3.1' into jb43

Android 4.3 Release 3.1