Add 'license' module to the generated Android.bp of VNDK snapshots

VNDK snapshot update must include 'license' module in Android.bp
files. Use the license text files in common/NOTICE_FILES directory.

Bug: 205641081
Test: python3 gen_buildfiles.py 30
Change-Id: Ia0d667664693a00aa29164e94d2a820c6ed77e4e
1 file changed