BpfNetworkStats - use static BpfMap objects for stats maps A & B

This might eliminate a failure mode with dreaded 524 error
from the kernel... or it might not, but it shouldn't hurt.

Bug: 230418056
Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: If2479daf77f61c220214ff507582295bd303fd21
1 file changed