Update null pointer exception message to print out the method

Let's add the method in the logging string for context when debugging failures. This should help developers debug more quickly.

Bug: 217171086
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Change-Id: I1aadeaa536f58a22dccaf6f1c783df23c9430c7a
5 files changed