hal_fingerprint: grant read access to /sys

avc: denied { read } for name="modalias" dev="sysfs" ino=17624 scontext=u:r:hal_fingerprint_default:s0 tcontext=u:object_r:sysfs:s0 tclass=file

Test: Marlin builds and boots without this denial.
Bug: 35197529
Change-Id: I3b64db571ac10c843f3765ed557ceac07bc6580e

public/hal_fingerprint.te

@@ -19,3 +19,4 @@ allow hal_fingerprint ion_device:chr_file r_file_perms;
 binder_use(hal_fingerprint);
 
 r_dir_file(hal_fingerprint, cgroup)
+r_dir_file(hal_fingerprint, sysfs)