[nullsafe][android] stop the analysis if there is no source file to analyze
[nullsafe][android] stop the analysis if there is no source file to analyze

Reviewed By: mbouaziz

Differential Revision: D13509512

fbshipit-source-id: 565a27eef

jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer