metrics_collector: add libmetricscollectorservice binder service

Switch user crash event notification from D-Bus to this Binder service.

Add a trampoline as a go-between for the -frtti and -fno-rtti sources.

Add MetricsCollectorServiceClient for crash_reporter to use, hiding the
binder proxy details.

Remove D-Bus message filtering from metrics_collector.

Bug: 25929888
Change-Id: Idcdd60ac476340fb11602fc9afab6cd87843e529