Tombstoned unlinks "trace_XX" files if there are too many of them.

avc: denied { unlink } for comm="tombstoned" name="trace_12"
scontext=u:r:tombstoned:s0 tcontext=u:object_r:anr_data_file:s0
tclass=file

Bug: 77970585
Test: Build/boot taimen. adb root; sigquit an app.

(cherry picked from commit eb8f938f)

Change-Id: I2f29d12f747d688f8f4e06b48cf72c5109adc2ae