Allow shell to unlink perfetto_traces_data_file.

Bug: 141704436
Test:
blueline:/ $ ls -lZa /data/misc/perfetto-traces
total 186
drwxrwx-wx  2 root   shell u:object_r:perfetto_traces_data_file:s0    3488 2019-09-30 14:12 .
drwxrwx--t 46 system misc  u:object_r:system_data_file:s0             3488 2019-09-30 14:08 ..
-rw-------  1 shell  shell u:object_r:perfetto_traces_data_file:s0  180467 2019-09-30 14:12 profile-shell
blueline:/ $ rm /data/misc/perfetto-traces/profile-shell
rm ro /data/misc/perfetto-traces/profile-shell (y/N):y
blueline:/ $ ls -lZa /data/misc/perfetto-traces
total 6
drwxrwx-wx  2 root   shell u:object_r:perfetto_traces_data_file:s0  3488 2019-09-30 14:13 .
drwxrwx--t 46 system misc  u:object_r:system_data_file:s0           3488 2019-09-30 14:08 ..
blueline:/ $

Cherry pick of c069bc134e80f86d16d7305d67e9cf44ceffbc2b

Change-Id: Ia710068c3cca53a415347fb0a7064740e500d15d
Merged-In: Ia710068c3cca53a415347fb0a7064740e500d15d
2 files changed