dumpstate: Fix missing Java anr traces in bugreport

Missing /data/anr/trace_dd files that are generated
for example by the finalizer watchdog are now packaged
in the bugreport zip file.

Test: create Java anr trace and trigger bugreport
Bug: 319729079
Change-Id: I3f23381c57e185540a47805f73795dac2c895eea