Hook up new pipeline so notifs are visible

Various small bugs made it so that turning on the new pipeline wouldn't
actually show anything. This CL takes out some of these bugs so
that turning on the pipeline shows you notifications.

Everything is still pretty broken (although not TOO crashy), but you can
at least confirm some things are working (things are inflating!)

Bug: 112656837
Test: adb shell device_config put systemui
notification.newpipeline.rendering true
Test: smoke test while rendering flag is off

Change-Id: Ie2f407963240d8bf98ae194397b4a4fd00b55c9a