Merge "libbinder: do not always compute open ashmem size" am: ad0d71da07 am: 7e85d0d3c2 am: 946bb23266 am: b8ba6b18e0 am: 3da7ad0769

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1850298

Change-Id: I168d4b1943203b19cc0b5e6a9d1537a11c73f9ea