Summary:
Pull Request resolved: https://github.com/facebook/flipper/pull/463
Was made aware [here](https://github.com/facebook/flipper/issues/461) that
we currently don't build with NDK 20 because of Folly. The above issue exists only for x86 platform and not for other platform. I have updated the folly and RSocket. Although this diff doesn't solve the issue mentioned above for x86, but it updates the dependencies to the latest version. To mitigate temporarily, I have updated the gradle to not build for x86.
Reviewed By: passy
Differential Revision: D15713205
fbshipit-source-id: 79dd5825b0b876c87a1868fde8f3353a76012267