Properly fix license issue in CircleCI (#362)
Properly fix license issue in CircleCI (#362)

Summary:
Apparently this seems to be the only way to make build work, with the updated licenses. It also follows the same strategy as Travis.

I am using double pipe in `sdkmanager` command execution, to avoid breaking the build, because `sdkmanager` returns exit code 141 in case it meets the requirements requested. (e.g.: `yes | sdkmanager --licenses` returns 141, which in turn breaks the build due to `set -eo pipefail` Bash flags, that CircleCI is using in order to execute any scripts)

For the record, I tried the following solutions, that did not work:
* Add accepted license SHA in Android SDK licenses folder.
* Accept all licenses prior to running the other jobs (with a separate job, working as a dependency to the rest of the Workflow jobs) (`yes | sdkmanager --licenses`)
* Accept all licenses prior to executing any Gradle command (without a separate job) (`yes | sdkmanager --licenses`)
Pull Request resolved: https://github.com/facebook/flipper/pull/362

Differential Revision: D13817430

Pulled By: passy

fbshipit-source-id: d8c95fc5b9202306dd50ea103b6e90142e73ef61

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