Match Git cloning examples for cloning with the repo examples.
Match Git cloning examples for cloning with the repo examples.

- Branch directory for dev branch
- Indent multi-line commands
- Dev remote URL

PiperOrigin-RevId: 482511022
Change-Id: Ie2b98afe564ce4e76d6b2acb540e893be8c1e165

AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx