TBR: TODOs: Correctly notify the adapter of changes to the data

adapter.notifyDataSetChanged() is a bad idea. It makes it hard for
the RecyclerView to animate any of its View Holders.

This CL swaps these notify calls out for the more specific kind.
This makes the list items appear to move as they are modified. It is
quite nice.

Closes https://github.com/vanadium/issues/issues/1298

Change-Id: Ifcd9662bcc96a4074b67db126c1f2e160375bdc1
4 files changed