Add/fix copyright notices

Several EmuGL files were missing copyright notices; added them. Others
had them but below other code, which makes checking for them more
difficult -- I moved these to the top of the file.

These files were all created by GraphTech as a work for hire for AOSP.

Change-Id: Iee67bcf1c9b54ad5aa8a9288ded0382a974c32cb
28 files changed