Comment 7 for bug 1579837

So I think what we're gonna do is use this bug for tracking the fixes and landings for the touch images. This will be for OTA12, OTA11 will not see the PK agent on it, we're just going to keep these bugs swept under the rug like they were in OTA10.

At the root of it all the issue seems to be bug 1512002 where accounts service was being too strict and we don't have a full session on the phone. By applying the patch in that bug we remove the need for USS to have a temporary PK agent and we remove the random prompts that are in bug 1580086.

For this bug:

policykit-unity8 task: Fix the crash that was happening on timeout.
ubuntu-system-settings: Remove the PK agent code.
accountservice: Backport the bug 1512002 patch to vivid overlay