Fix broken Test Docker Android

Summary:
Test Docker Android is failing with `No space left on device`
I've fixed it by freeing up some space on the runner.

I'm looking into potentially removing this job entirely as I believe it's not
really helpful at the moment.

Changelog:
[Internal] [Changed] - Fix broken Test Docker Android

Reviewed By: ShikaSD

Differential Revision: D35013831

fbshipit-source-id: 594e65fa05c7dfc8b5acfde88658b341d26aa586