ANDROID: Add optional __get xattr method paired to __vfs_getxattr Add an optional __get xattr method that would be called, if set, only in __vfs_getxattr instead of the regular get xattr method. Signed-off-by: Mark Salyzyn <salyzyn@google.com> Bug: 133515582 Bug: 136124883 Bug: 129319403 Change-Id: If9f6cf3e0d964e77af769244bb1e8f6aee4f4445