Merge "gsid: Allow reading the size of super block device" am: 92eeceafd3 am: 04b0095861 am: c5ba3e32b6 am: d44b25c751

Original change: https://android-review.googlesource.com/c/platform/system/sepolicy/+/1879536

Change-Id: I44b713b110700b96049226309d7c557f0d34bfd7