Make multi import one request

VCardService may exit after processing the first request for
multiple imports, in which the user may see strange "rejected"
messages. We should pack those multiple import into one message,
which forces VCardService to process after all the requests.

Bug: 4540627
Change-Id: I4d645eb3a04e35da465b0c4181cbff5bf7ebf029
2 files changed