In isMobileOk don't execute finally if mobile data is not supported.

Move the early return outside the try {} finally so we don't call
setEnableFailFastMobileData(DctContants.DISABLED). Otherwise
referencing counting is wrong and an exception is thrown in DcTrackerBase.

Bug: 10304904
Change-Id: I5ba5121e473bada9f3daa8d6f3d3577cec8212fc
DO NOT MERGE: MDST is not ready until connected to DcTracker.

When the system becomes loaded the PhoneApp can be delayed
significantly and a call to setEnableFailFastMobileData may not
occur because the channel between the MobileDataStateTracker (MDST)
and DcTracker (DCT) is not connected.

Solution: Add a isReady to MDST and isMobileDataStateTrackerReady to
ConnectivityService and call it from isMobileOk.

Bug: 10351868
Change-Id: I92f9d58121b88186b636cd71c2fd2ef9a28f7cf6
Add support for handling mobile provisioning networks.

When a sim is new or it has expired it needs to be provisioned
with the carrier. Basically provisioning is associating a sim with
a user account. When a sim isn't provisioned then operators will
restrict access to the network and only allow certain addresses
or services to be used.

This set of changes allows two types of provisioning networks to be
recognized. The first is a network that causes all DNS lookups to be
redirected to a different address than was intended. This is exemplified
by how T-Mobile works.

The second technique uses a special apn for provisioning. An example is
AT&T where lwaactivate is the provisioning apn and broadband is the
normal apn. We first try broadband and if we are unable to connect we
try lwaactivate. When we see the activate we identify it as special and
the ApnContext.isProvisioningApn will return true.

In the future our plan is to create a new network type that can be added
to the apn list, but for now it identified by name.

Here is a list of significant changes:

 - CaptivePortalTracker now only test WiFi networks instead of all networks
 - checkMobileProvisioning checks for provisioning networks and doesn't
   try to ping.
 - IConnectivityManager.aidl changes:
   * getProvisioningOrActiveNetworkInfo was added to and used by Manage
     mobile plan in WirelessSettings so even when there is no active
     network it will still allow provisioning. Otherwise it would report
     no internet connection.
   * setSignInErrorNotificationVisible is used by both
     CaptiviePortalTracker and checkMobileProvisioning so they use the
     same code for the notifications.
   * checkMobileProvisioning was simplified to have only a timeout as
     returning the result is now harder as we abort simultaneous call
     otherwise we'd could get into loops because we now check every time
     we connect to mobile.
 - Enhanced MDST to handle the provisioning network.
 - Added CONNECTED_TO_PROVISIONING_NETWORK to NetworkInfo to make a new
   state so we don't announce to the world we're connected.
 - TelephonyIntents.ACTION_DATA_CONNECTION_CONNECTED_TO_PROVISIONING_APN
   is sent by the low level data connection code to notify Connectivity
   Service that a provisioning apn has connected. This allows CS to
   handle the connection differently than a normal connection.

Bug: 10328264
Change-Id: I3925004011bb1243793c4c1b963d923dc2b00cb5
Do not change NetworkInfo.DetailedState.

I'd changed DetailedState to force ConnectivityService to treat
provisioning apn's specially. In particular so that they wouldn't
be identified they were fully connected until the provisioning
actually started. The problem is that DetailedState is a public enum
that has a CTS test and just changing the CTS to allow for the new
state (CONNECTED_TO_PROVISIONING_NETWORK) was inappropriate.

Instead I've added a new mIsConnectedToProvisioningNetwork variable
and used the DetailedState.SUSPENDED as the intermediate state.

Bug: 10620248
Change-Id: Id4a842398cad67455541ce629959351c27d83639
Do not always call setIsConnectedToProvisioningNetwork(false)

Previously I was calling setIsConnectedToProvisioningNetwork(false) always,
but all MDST's receive every broadcast. Thus we could over write an MDST's
mNetworkInfo.mIsConnectedToProvisioningNetwork to false, unless the MDST
that was set to true was last, i.e the code was order dependent.

If the provisioning networks value was false instead of true
when handleMobileProvisioningAction was called we wouldn't invoke
mdst.enableMobileProvisioning because network info would be null.

Thus the provisioning network would never transition to CONNECTED and
a default route wouldn't get setup and the browser couldn't access the
website.

Now setIsConnectedToProvisioningNetwork is only set to false when the
apnType matches and we won't indiscriminately change it and are not
order dependent.

Bug: 10853805
Change-Id: I68a4f9bdf5dc18d90f4cdef7a60811f57be67261
Merge remote-tracking branch 'aosp/jb-mr2.0.0-release' into 4.3