Fix dumpsys timeouts.

Both dumpstate and dumpsys can timeout when a child process hangs;
usually these values match, except when running dumpsys to dump all
services, in which case we need a timeout for all services (90s) and
individual timeouts for each service (10s).

BUG: 26379932
Test: manual
Change-Id: I37129ba9980976aa9bfe8eb132cdd0870fd93e59