Allow dumpstate to read /data/system/shutdown-checkpoints/

Bug: 260366497
Bug: 264600011
Test: Take bugreport and check dmesg for avc error
Test: Reboot and check shutdown-checkpoints
Change-Id: Ifcc7de30ee64e18f78af147cd3da39d7c6dc6f5f
diff --git a/private/file_contexts b/private/file_contexts
index 6166065..ca7e97a 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -781,6 +781,9 @@
 # User icon files
 /data/system/users/[0-9]+/photo\.png             u:object_r:icon_file:s0
 
+# Shutdown-checkpoints files
+/data/system/shutdown-checkpoints(/.*)?          u:object_r:shutdown_checkpoints_system_data_file:s0
+
 # vold per-user data
 /data/misc_de/[0-9]+/vold(/.*)?           u:object_r:vold_data_file:s0
 /data/misc_ce/[0-9]+/vold(/.*)?           u:object_r:vold_data_file:s0