Add versioning for Android APM agent docs

[colleenmcginnis]

Fixes elastic/observability-docs#3240

Preview of the APM Android Agent docs

[bmorelli25]

🚀

[colleenmcginnis]

@LikeTheSalad can you confirm which versions are compatible with the APM Android agent? It looks like the iOS agent goes back to 7.14. Does the Android agent go back as far as that?

[LikeTheSalad]

@LikeTheSalad can you confirm which versions are compatible with the APM Android agent? It looks like the iOS agent goes back to 7.14. Does the Android agent go back as far as that?

It depends 😅 - If the support is only based on the APM server capabilities, then yes, we can go with the same value as iOS. However, if it also takes into account Kibana being aware of Android agents and displaying an Android icon when it finds one, then that work was done here, which was part of version 8.4.0 of Kibana.

[bmorelli25]

Thanks, @LikeTheSalad! Colleen, I think it makes the most sense to use the APM UI implementation (8.4.0) as our minimum supported version.

[colleenmcginnis]

Thanks! I'll push an update then we should be good to gooo!

[nkammah]

run docs-build