storage: fix adb bugreport and refactor the existing rules

avc: denied { getattr } for comm="df" path="/mnt/vendor/persist" dev="sda15" ino=2 scontext=u:r:dumpstate:s0 tcontext=u:object_r:persist_file:s0 tclass=dir permissive=1
avc: denied { call } for comm="binder:10121_3" scontext=u:r:dumpstate:s0 tcontext=u:r:vold:s0 tclass=binder permissive=1
avc: denied { getattr } for comm="df" path="/mnt/vendor/efs" dev="sda5" ino=3 scontext=u:r:dumpstate:s0 tcontext=u:object_r:modem_efs_file:s0 tclass=dir permissive=1
avc: denied { getattr } for comm="df" path="/mnt/vendor/modem_userdata" dev="sda7" ino=3 scontext=u:r:dumpstate:s0 tcontext=u:object_r:modem_userdata_file:s0 tclass=dir permissive=1

Bug: 361093041
Test: local build
Change-Id: I5c6be63beebf66d64db7e495c28493ab35621054
Signed-off-by: Randall Huang <huangrandall@google.com>
diff --git a/storage/sepolicy/file.te b/storage/sepolicy/file.te
index ed4f925..0fa9564 100644
--- a/storage/sepolicy/file.te
+++ b/storage/sepolicy/file.te
@@ -1,4 +1,6 @@
+# file.te
 type debugfs_f2fs, debugfs_type, fs_type;
 type dump_storage_data_file, file_type, data_file_type;
 type sg_device, dev_type;
 type sg_util_exec, exec_type, vendor_file_type, file_type;
+