Extend initialization flags and FUSE_PASSTHROUGH to 64 bits am: ab9271b86f am: 4bd6ce23e5 am: b62341d86b am: aa29d43492

Original change: https://android-review.googlesource.com/c/platform/external/libfuse/+/1964929

Change-Id: Ib2dabed97e6f2db218c60d07e1fef62f445efa6b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>