Rename NearbyServiceImpl to NearbyService

As there is no NearbyService wrapper anymore, just name
NearbyServiceImpl NearbyService.

This is done in a separate change as git detects deleting a file, and
moving another file to the old name as one large edit on the original
file.

Bug: 189355156
Test: m; booted, service started
Change-Id: I6817a47be8c29eed6f99eb88d7982e5e6968eb22
1 file changed
tree: 3cbf060e668678b8a8e1e7981a6e702bb0a71ec8
  1. nearby/