ApfCounterTracker - reserve three slots for APFv6 endianness and allocate/transmit failure

Technically only needed for APFv6+, but easier to always reserve.

See also: aosp/2930730

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I32515c9d3b9126f1b1e74d3f64d97facf3e8bdcf
1 file changed