Remove D-Bus API from ledservice and replace with Binder

The hardware access service of ledflasher (ledservice) used to expose
D-Bus API to ledflasher daemon to get low level access to on-board LEDs.

We are moving away from D-Bus in favor of Binder, so replace the RPC
to use binder now.

BUG: 26404046
Change-Id: Ib0ff50868e33a3be3a4dc6cdf92d92f5b4c80287
23 files changed