not with the phone library as written.
the list returned by queryintentactivities is a list of strings representing the package name and the class of activities which can handle your intent. the "/" can be used as a delimeter. everything that is to the left of the "/" is the package name. just use what's on the left.
if that is too involved, you can write your own little queryintentactivities method in java or with javaobject. you can make it return only a list of package names.