Define 'super_block_device' type

Bug: 78793464
Test: fastboot getvar partition-size:super

'super_block_device' corresponds to the super partition
required for flashing dynamic partitions.

Change-Id: I323634b6797ead7c5face117a7028bf9ab947aea

private/compat/26.0/26.0.ignore.cil

@@ -114,6 +114,7 @@
     statsdw_socket
     statscompanion_service
     storaged_data_file
+    super_block_device
     sysfs_fs_ext4_features
     system_boot_reason_prop
     system_lmk_prop

private/compat/27.0/27.0.ignore.cil

@@ -101,6 +101,7 @@
     statsdw
     statsdw_socket
     storaged_data_file
+    super_block_device
     system_boot_reason_prop
     system_lmk_prop
     system_suspend_hwservice

private/compat/28.0/28.0.ignore.cil

@@ -16,6 +16,7 @@
     mnt_product_file
     overlayfs_file
     recovery_socket
+    super_block_device
     system_lmk_prop
     system_suspend_hwservice
     time_prop

public/device.te

@@ -104,3 +104,6 @@ type metadata_block_device, dev_type;
 
 # The 'misc' partition used by recovery and A/B.
 type misc_block_device, dev_type;
+
+# 'super' partition to be used for logical partitioning.
+type super_block_device, dev_type;

public/fastbootd.te

@@ -38,6 +38,7 @@ recovery_only(`
   allow fastbootd dm_device:chr_file rw_file_perms;
   allow fastbootd dm_device:blk_file rw_file_perms;
 
+  allow fastbootd super_block_device:blk_file rw_file_perms;
   allow fastbootd system_block_device:blk_file rw_file_perms;
   allow fastbootd boot_block_device:blk_file rw_file_perms;