ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.

These will be required going forward.

Change-Id: Idf0593461cef88051564ae0df495c156e31048c4
Signed-off-by: Martijn Coenen <maco@google.com>
Git-commit: 025b221d
Git-repo: https://android.googlesource.com/kernel/common/


Signed-off-by: Runmin Wang <runminw@codeaurora.org>