Merge "Updates the FB_COMMAND_SIZE from 64 to the linux max value of 4096 and updates the relevant unit tests." am: a67092a7b8 am: c8820b2736

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2214970

Change-Id: I49d9ed1657cc149b7388a49f5f4257a7ab88132c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>