Make the names of 'soong_config_module_type_import' modules unique.

blueprint.writeAllModuleActions attemts to sort modules by name, and
sorting them assumes that each module's name is unique. Although
soong_config_module_type_import modules will not generate anything,
their names should be unique, too for that reason.

Fixes: 150421585
Test: m nothing
Change-Id: I6782e42c129dc3b0fc7649ce97d5f94effc63fa7