Ubuntu touch now supports 3GB pinephones + major performance improvements

Ubuntu touch now supports 3GB pinephones, additional to this there are some major performance improvements to the wayland renderer, the UI now feels much more smooth and fluent. Before this the performance was blocked in a render thread causing the FPS to be locked.

This also includes all the goddies from the upcoming OTA-13 :) see https://github.com/orgs/ubports/projects/17 for a more complete changelog.

Get it from https://ci.ubports.com/job/rootfs/job/rootfs-pinephone-systemimage/