bindeRpcBenchmark: rpc uses separate process

For parity of comparison w/ kernel binder (this doesn't really change
the results on cuttlefish - I still need to test on real devices).

Bug: 182940634
Test: binderRpcBenchmark
Change-Id: I7dfa5e01ce8bc05240010b7aac96e2c7bdfa6240
1 file changed