tsan: fix Java heap block begin in reports

We currently use a wrong value for heap block
(only works for C++, but not for Java).
Use the correct value (we already computed it before, just forgot to use).

Depends on D114593.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D114595

GitOrigin-RevId: b584741d06ef01b7497d58776e225aa189528968
2 files changed