Add NTFS support in sepolicy.

This CR, when paired with a functional NTFS implementation and the
corresponding vold updates, will allow NTFS USB drives to be mounted
on Android.

Bug: 254407246

Test: Extensive testing with NTFS USB drives.
Change-Id: I259882854ac40783f6d1cf511e8313b1d5a04eef
diff --git a/private/file_contexts b/private/file_contexts
index 4deecf7..72fae62 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -230,6 +230,7 @@
 /system/bin/extra_free_kbytes\.sh u:object_r:extra_free_kbytes_exec:s0
 /system/bin/fsck\.exfat	--	u:object_r:fsck_exec:s0
 /system/bin/fsck\.f2fs	--	u:object_r:fsck_exec:s0
+/system/bin/ntfsfix	--	u:object_r:fsck_exec:s0
 /system/bin/init		u:object_r:init_exec:s0
 # TODO(/123600489): merge mini-keyctl into toybox
 /system/bin/mini-keyctl	--	u:object_r:toolbox_exec:s0