reject PTU system request when PTU not in progress

[iCollin]

Fixes https://github.com/smartdevicelink/sdl_core/issues/3715 https://github.com/smartdevicelink/sdl_core/issues/3076

This PR is not ready for review.

Risk

This PR makes no API changes.

Testing Plan

ATF, manually

Summary

Reject SystemRequest with type PROPRIETARY or HTTP when PTU is not in progress and when sent from different app than the one which Core requested the PTU from

Changelog

Breaking Changes

• apps have much less ability to control policies

CLA

• [x] I have signed the CLA