Replace the current boring "fiery android" icon we use for dev with the cool nightly icon

Summary

Summarize the bug encountered concisely. We (@clairehurst and @donuts) don't like the current icon we use for dev and want to use our cool nightly icon instead

What is the current bug behavior?

What actually happens.

We see the boring fiery android icon

What is the expected behavior?

What you want to see instead

We see our cool nightly icon