[Image Update] - please add program "screen" to cloud-shell

[boliu83]

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Which image would you like to change?

cloud-shell:latest

What changes are you requesting?

add program screen

What scenario are these changes enabling?

Correctly display non-unicode content.

Currently cloud-shell cannot render non-unicode content such as zh_TW.BIG5 encoded content properly. The program "screen" acts a virtual terminal in between and can convert non-unicode content to Unicode characters using its ":encoding" command so the content can be displayed correctly in cloud-shell.

By how much does this change change the image size?

Not sure, the binary "screen" is only 464KB on my Ubuntu 20.04 machine