Add read permission for shutdown checkpoints files

Enables for diagnostic apps to read the shutdown checkpoints files

Test: N/A
Bug: 306198106
Change-Id: Idae6d3d0c941a90db0e176e8dcaa70574d807267
diff --git a/rootdir/init.rc b/rootdir/init.rc
index f1670ae..734197b 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -902,7 +902,7 @@
     mkdir /data/system/users 0775 system system
     # Mkdir and set SELinux security contexts for shutdown-checkpoints.
     # TODO(b/270286197): remove these after couple releases.
-    mkdir /data/system/shutdown-checkpoints 0700 system system
+    mkdir /data/system/shutdown-checkpoints 0755 system system
     restorecon_recursive /data/system/shutdown-checkpoints
 
     # Create the parent directories of the user CE and DE storage directories.