Handle pullVcardListing req without search value for Number attr.

When sending pullVcardListing request to the phone while using
the search attribute "Number" without any search value, the
phone responds with error code "internal error".

Instead the phone should return all numbers in the phonebook.

Change-Id: I7c11b76bbd61882c62be3533b1c45c2c72f497b2
1 file changed