### What problem does this PR solve?
Changed test priorities in multiple test files, downgrading from p1 to
p2 and p2 to p3.
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Move memory and message apis to /api, and add sdk support.
### Type of change
- [x] New Feature (non-breaking change which adds functionality)