LOC related fixes and improvements (including QMI over MBIM indication support)

This MR includes several fixed and improvements in the LOC service definition, including support for several qmicli operations.

As part of the changes, the implementation also adds support for receiving QMI indications via QMI over MBIM, but only if requested explicitly with a new "open flag" in the QmiDevice, as it involves additional setup steps that are not always needed.