libbinder: Add __assert in Trusty

Delegate code calls the __assert macro which was
not defined on Trusty, causing the default implementation
based on syslog to be used. This provides a Trusty-specific
__assert implementation that uses Trusty logging APIs.

Bug: 230135749
Test: build.py on Trusty
Change-Id: Ic256a1a26a046cb697479e2328312972edbad4a6