Change signature test to loop up superclasses until it finds one that matches.

This handles the case where a class has hidden superclass which extends the expected superclass.

Fixes:
b/7327165
b/1496822

(cherry picked from commit cb4ff3f8dce823735c6619be0f73b8a97cf47aa2)

Change-Id: I8357e55755ce3a55f53b38b62cbb8ee9eb0515b5