drm_hwcomposer: License NOTICE file and metadata from AOSP

This is a forward ported patch from the AOSP/master
branch which adds the Apache2 license notice and
a empty MODULE_LICENCE_APACHE2 file.

I'm submitting these to try to align aosp/master
with upstream fdo/master

BUG:67772237
Change-Id: I65396852e1b64d2052232b38740e6ede20e81776
Signed-off-by: John Stultz <john.stultz@linaro.org>
2 files changed