Tweak VVM error handling

+ Losing cellular signal also set
  DATA_CHANNEL_STATE_NO_CONNECTION_CELLULAR_REQUIRED, instead of
  launching a separate event.
+ handle SUBSCRIBER_PROVISIONED and SUBSCRIBER_BLOCKED for VVM3
  SUBSCRIBER_PROVISIONED will deactivate VVM client, as required for
  VVM3

Bug: 28968317
Change-Id: If683f5c4caf62562318ea2bb415e46de70b0f66f
7 files changed