libhwbinder_benchmark -= 1 race

The comments here were wrong. I*::getService only waits for HIDL
services which are declared in the VINTF manifest. This test usually
passed before because testing the passthrough service gave enough
time for the server to start.

Fixes: 206700689
Test: atest libhwbinder_benchmark
Change-Id: Ibaac31fde82d6cbd2c03aac362fd26ba48f9165f
1 file changed