Revert^2 "libbinder: binderRpcTest on host"

For even faster development.

Modified to disable this on the Mac build, where binder can't be built.

Bug: 167966510
Test: binderRpcTest on host and device
Change-Id: I44a66c3b39d82a36d27a2660d8c5c78e15ff896d
2 files changed