Allow access to the metadata partition for metadata encryption.

Bug: 63927601
Test: Enable metadata encryption in fstab on Taimen, check boot success.
Change-Id: Id425c47d48f413d6ea44ed170835a52d0af39f9f
diff --git a/private/e2fs.te b/private/e2fs.te
new file mode 100644
index 0000000..2c4c013
--- /dev/null
+++ b/private/e2fs.te
@@ -0,0 +1,3 @@
+allow e2fs devpts:chr_file { read write };
+allow e2fs metadata_block_device:blk_file rw_file_perms;
+
diff --git a/private/fsck.te b/private/fsck.te
index 3a36329..f8e09b6 100644
--- a/private/fsck.te
+++ b/private/fsck.te
@@ -1,3 +1,5 @@
 typeattribute fsck coredomain;
 
 init_daemon_domain(fsck)
+
+allow fsck metadata_block_device:blk_file rw_file_perms;