BpfHandler - remove use of getMap()

The FD number isn't actually useful debugging information,
and I want to get rid of this fd leak out of BpfMap class.

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I981832b019b57f534bed1c1fbfedf6457abba6fa
1 file changed