Execute the following command from your drozer console:

dz> run app.service.info –-package [package name]

Running this command with no arguments lists all the services installed on the target device. It will look something like the following screenshot when run:

You can also use the following filters to narrow down your search:

The app.service.info module works like most of the other .info and .list type drozer modules by making calls to the package manager through the API. Here's the call to the package manager from drozer/master/src/drozer/modules/service.py:

def execute(self,arguments):
  if arguments.package == None:
    for package in self.packageManager().getPackageInfo      (common.PackageManager.GET_SERVICES |         common.PackageManager.GET_PERMISSIONS):
      self.__get_servcies(arguments, package)
  else:
    package = self.packageManager().getPackageInfo(arguments.package, common.PackageManager.GET_SERVICES | common.PackageManager.GET_PERMISSIONS)
    self.__get_services(arguments,package)

The script does a check to see whether a specific package was passed as an argument, which is the first piece of code in the execute method:

if arguments.package == None:

If no argument or package name was defined, the script grabs a list of packages and iterates through them by calling the self.__get_services() method, which determines some package properties through string-matching the data returned from the self.packageManager().getPackageInfo(arguments.package,common.PackageManager.GET_SERVICES | common.PackageManager.GET_PERMISSIONS) call; for example, when looking for services with a specified permission, it does the following:

services = self.match_filter(services, "permission", arguments.permission)

This is to extract a list of services with the required permission.