FP2-789: calibrate proxy sensor

Add sepolicy for sensor /persist/sns.reg file

Change-Id: I6de41a7b5ae167c628739d6f34ec92648b97d57d
diff --git a/common/file.te b/common/file.te
index 9c8b8e3..33902ed 100644
--- a/common/file.te
+++ b/common/file.te
@@ -27,6 +27,7 @@
 type persist_file, file_type;
 type persist_data_file, file_type;
 type persist_drm_file, file_type;
+type persist_sns_file, file_type;
 type data_qsee_file, file_type;
 
 type diag_data_file, file_type, data_file_type;