Merge "Fragmentation and reassembly of large messages" into main am: 7aebb9754c

Original change: https://android-review.googlesource.com/c/trusty/app/secretkeeper/+/2921725

Change-Id: If13a8b40b14a4b11e8a96ceeacbf28f63b417779
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>