Revert "Optimize BpBinder struct size."

This reverts commit 76c0aa44bb1aeed3e611bc2ed9480b7bfd2439fd.

Reason for revert: breaks some tests b/150837217 - will investigate why later

Change-Id: I7fe4c567a4b46d02bb31c6442e969b33b6237513
2 files changed