Add bundletools to build .aab's that are needed for .apks files.

It is used by the Mainline build scripts.

Test: vendor/google/build/mainline_modules_bundles.sh
  on internal master-art branch
Bug: 202192894
Change-Id: Ia63535bf48729939b1984e7bcd5bf9b3b40d84cf
1 file changed