Auto scroll to bottom for initial loading and does not load subsequent page

Issues:
1. When loading first page for the first time, recycler view scrolled to very bottom
2. Sometimes does not load subsequent page after loading first page for the first time

https://drive.google.com/drive/folders/14aOosTqeY747SajXxcgwTrzLwD51NZNP?usp=sharing

Start by reproducing the initial-load behavior in the codelab and review the paging and RecyclerView entry points. Compare the first-page scroll position and subsequent-page loading against the expected behavior, using the linked recording for additional context; done means the list remains at the intended position and reliably loads the next page.

Written by the indexing model from the issue text.