Some of our files didn't have a copyright notice at all, let's add it. Also, update the notices in other files and ensure a SPDX identifier is present in all but the most trivial files. Change-Id: If7fa19ce484b415bc645e39b3d0d666b44b5f0fd
Change-Id: Id934d7a763b619d52cbec7de439b3708225b81f3
Change-Id: I67343f016757c23a85db6b526b6f60476e91ffc3