Binary package “hidl-gen” in ubuntu lunar

Compiler for the HIDL

 HAL interface definition language or HIDL is an interface description language
 (IDL) to specify the interface between a HAL and its users. It allows
 specifying types and method calls, collected into interfaces and packages.
 More broadly, HIDL is a system for communicating between codebases that may be
 compiled independently.
 .
 https://source.android.com/devices/architecture/hidl/