relicense new source files under BSD

This project was started as a BSD licensed work, and it remained that
way even after the AOSP move, so make sure new files correctly reflect
that too.  Otherwise we end up with half the files using BSD and the
other half using Apache which is annoying.

Bug: None
Test: grepped for "apache" in all the files
Change-Id: I7cc7c890b42a1ded7552e1852246eaf86ca8428c
13 files changed