debuggerd_client_test: massively increase timeouts.

debuggerd_client.race seems to have suddenly started to flake, for no
apparent reason. This doesn't seem to reproduce locally, so increase
the timeouts to rule out our test VMs being slow.

Bug: http://b/142571257
Test: treehugger
Change-Id: Ic54a78b8da36cb1163cec7e7976c73c3da628a30