Following yesterday's Android 4.2.2 OTAs to various Nexus devices, Google today followed up with the push of all 4.2.2 open source code changes to AOSP. There is a lot here to parse through this time around compared to the minor 4.2.1_r1.2 commit from 10 days ago.
We've already identified some obvious user-facing changes, which we'll post about separately soon to keep it clean and organized. The purpose of this post is, as before, to find the low-level changes that may not be obvious. So move the beard out of the way and dig in.
Update: Ron detailed some new things here: New Android 4.2.2 Features: Toggle From Quick Settings, Better App Download Notifications, and Some New Sounds!