[devmgr] Use () instead of (void) in C++ Test: no functional change Change-Id: I415e5d250c6f07e881be69476ded7c1997861758
[devmgr] Prefer nullptr to NULL in C++ Test: CQ Change-Id: Ia76dc1cc448c393208b1426ed66c90054a1308a3
[core] Build devhost-api as C++ Test: CQ Change-Id: Ia83700a1de2b457e6d1d37ed694a477355f1e100