init_kill_services_test: binder logs on apexd fail

Print logs necessary to understand why apexd isn't shutting
down when this test fails, due to a rare flake.

Bug: 285458033
Test: init_kill_services_test (and cause this error to be hit)
Change-Id: Ic9cbf7b2b9fa89504e4a53597065e94c32233e12