BpfHandler.h - switch mStatsMapB from BpfMap to BpfMapRO

We'd like to switch more of these, but this is the only one
where tests don't get in our way.

We'll fix the rest later.  This gives us an *example* for
further testing.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I9b280c7ba2d19644fc3cdd0c132de85f45df69b4
2 files changed