[rfsim] fix delayed sleep handling and align with radio API - #833

[rfsim] fix delayed sleep handling and align with radio API#833

EskoDijk wants to merge 2 commits into

openthread:mainopenthread/ot-ns:mainfrom

EskoDijk:pr-rfsim-state-fixes-and-apiEskoDijk/ot-ns:pr-rfsim-state-fixes-and-apiCopy head branch name to clipboard