Add ohttp support to the Android megazord [ci full]

[bendk]

Upgrading ohttp to the latest version, which is needed to make the builds work.

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[gruberb]

I think ohttp is not building 0.7.1 at the moment due to: https://github.com/martinthomson/ohttp/issues/85

A workaround:

[patch.crates-io]
generic-array = "=0.14.7"

I tested the latest main from the ohttp crate and build it locally with cargo update -p generic-array --precise 0.14.7 and it works.

[bendk]

I just rebased this branch, we'll see what happens with generic-array. I think it'll be okay in app-services, because we're using 0.14.5 in our lock file. However, we may hit that issue when we vendor this into moz-central.