Re-commit: Smooth scroll RecyclerView on a11y ACTION_SCROLL_*

This is consistent with the behavior of ListView and ScrollView for that action

This was previously reverted due to suspected perf regression which ended up
being unrelated. Re-committing this.

Bug: 63778054
Test: Go through bug steps and ensute it's fixed
Change-Id: I633294512f08ec31a0325c540881bbbcbcefe016