Make profcollectd mlstrustedsubject.

Without being mlstrustedsubject, profcollectd can't read
/proc/<pid>/maps for app processes:

avc: denied " {" read" } for " scontext=u:r:profcollectd:s0
tcontext=u:r:platform_app:s0:c512,c768 tclass=file permissive=0

Bug: 166559473
Test: build and run profcollectd.

Change-Id: I2a20428694edbd87b1304c5f2221ddf699b8193a
1 file changed