STK: Handle ICC refresh and card removal, and hotswap fix

 --- Register for ICC refresh and let CatService's clients know when
   an ICC refresh occurs.

   Monitor card status. When card status moves to absent/present let
   clients know.

   Don't dispose CatService based on the number of applications.
   Instead dispose it when UiccCard goes away

   This helps avoid the race condition in the following scenario:
   1. Radio is on and card is present
   2. Turn Radio Off
   3. Turn Radio On
   4. Proactive command received

   If CatService was disposed when card goes away on radio off
   then it is possible for the unsol proactive command to be received
   before Catservice is up and running on radio on.

 --- Dispose objects properly for hotswap

   During hotswap, CatService object is disposed and new object
   is created. However RilMessageDecoder still holds reference to
   old object of CatService, and hence sends decoded command
   to old object of CatService leading to stk failure. In this fix
   below objects are disposed properly when CatService is disposed.

   1) RilMessageDecoder
   2) CommandParamsFactory
   3) IconLoader

Change-Id: Iee4ab009a0f9708a1ee2d87460e60765e46b4229