[automerger skipped] Merge "Document the default alignment and padding value." am: 40122ae511 am: 889f249f91 am: 8f29728ced -s ours

am skip reason: skip tag Change-Id I89c16c3e20939a0ad68d9e3b0061c4a16dc00d8b with SHA-1 e6dcc9a38d is already in history

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1641200

Change-Id: Ibc08c87c3a3447413490fbe78b7cb09dcff9dcde