Class Linker: Implement default interface verification ordering.

We ensure that default interface verification failure is propagated to
the implementing class so that the compiler is able to properly handle
verification failures. Furthermore we ensure that default interfaces
are verified at the same time their implementing classes are.

This does not add additional support for default methods to the verifier.

This adds a basic test of this functionality.

Previously assumptions made about the order of verification in our
code could cause a check failure during compilation. Our old code
assumed that all code that would be run during a classes
initialization had been verified before any of it was run. The default
interfaces broke this assumption. Now we will simply verify default
interfaces with any classes that implement them.

Bug: 24618811

Change-Id: Ia11a50a28889dbd7ca22ffa730ef443e39f3cb5b