Upgrade bundletool to bundletool-20191212.Thu.12 RC00 am: 3b23f6528a

Change-Id: I4e06bcf08113aaf79131bdf41ee677e0548c6eea
tree: 19c5cd2e0ef7bd3dab485ee7d0e437885a25bbad
  1. bundletool-all-20191212.jar
  2. LICENSE
  3. METADATA
  4. MODULE_LICENSE_APACHE2