binderRpcTest: hermiticity - salt UDS name w/ PID

When binderRpcTest, binderRpcTestNoKernel, etc.. run at the same
time, they sometimes conflict. It seems the infra has started running
them at the same time (suspected).

Bug: 271860373
Test: binderRpcTest
Change-Id: I29d441cb3126b8960c5a30debca7b20cc1723863
1 file changed