Remove AVD code from Android CI
Remove AVD code from Android CI

Summary:
We don't really run AVD (Emulators on CI) so those steps
are entirely unnecessary and skipped every time. I'm removing them.

Changelog:
[Internal] [Changed] - Remove AVD code from Android CI

Reviewed By: cipolleschi

Differential Revision: D41521976

fbshipit-source-id: 2737ef0dfc84198ab9b837819c16ae46280ba43f

facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native,facebook/react-native