Merge "documenting optimized flash super" into main am: a3b232c30c am: b5bb46cd25 am: 11481b3cfe am: d28f20f735 am: 5b5ce9568f

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2725774

Change-Id: Ic5e2dd698fb03f5c970293d3bf1d92ca411cf946
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>