shill: cellular: Update additiona_providers uuids to standard format.

After CL:198774 we use standard 128 bit uuids. This CL updates the additional
manually maintained providers to follow suit.

As a result, it updates the references to Verizon Wirless uuids in the cellular
code.

BUG=chromium:371179
TEST=Run shill_unittests.
     Test verizon LTE activation.

Change-Id: Ic70ec4d7c04364f5790562b2a8d9ac2630a2c964
Reviewed-on: https://chromium-review.googlesource.com/198794
Reviewed-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Prathmesh Prabhu <pprabhu@chromium.org>
Tested-by: Prathmesh Prabhu <pprabhu@chromium.org>
diff --git a/cellular_capability_universal_cdma_unittest.cc b/cellular_capability_universal_cdma_unittest.cc
index acd6b50..905f58b 100644
--- a/cellular_capability_universal_cdma_unittest.cc
+++ b/cellular_capability_universal_cdma_unittest.cc
@@ -284,7 +284,7 @@
       "POST",
       "esn=${esn}&mdn=${mdn}&meid=${meid}"};
   const vector<MobileOperatorInfo::OnlinePortal> kOlpList {kOlp};
-  const string kUuidVzw = "vzw";
+  const string kUuidVzw = "c83d6597-dc91-4d48-a3a7-d86b80123751";
   const string kUuidFoo = "foo";
 
   SetMockMobileOperatorInfoObjects();