libbinder: recommend against getService

This API is too difficult to rewrite underneath because
it would require reconfiguring all the threadpools of
every process, but we can recommend against it.

It's polling. We want event-driven.

Bug: 249762862
Test: N/A
Change-Id: Idd465dc390960bb76fc6abaf050e5c0365f46088
1 file changed