Summary:
Packages are now defined in `scripts/.tests.env`, so the checksum is updated accordingly.
We also throw away the cache if the checksum fails as not doing so may prevent us from picking up new packages due to the filesystem check in `scripts/android-setup.sh`#getAndroidPackages(), as the presence of the `installed-dependencies` file restored from cache will incorrectly flag all deps as being installed.
Closes https://github.com/facebook/react-native/pull/19298
Differential Revision: D8025918
Pulled By: hramos
fbshipit-source-id: 189492baac2fea39280884ea20e376a368e23c2e
8c74864d7b