package daemon: CommitTransactionHandler: Use NotOwningEntryRef
package daemon: Move pending job accounting back to Volume
package daemon: Pass volume state CommitTransactionHandler

... and remove the getter from Volume again.
package daemon: Retrieve all package directories from packagefs
packagefs: Fix ioctl PACKAGE_FS_OPERATION_GET_VOLUME_INFO

... in case a larger buffer is provided.
packagefs: Extend PACKAGE_FS_OPERATION_GET_PACKAGE_INFOS ioctl

Also return the package file names.