RESTRICT AUTOMERGE Fix: fragment packets

Small overflow window

Bug: 147227320
Test: net_test_hci_fragmenter_native
Tag: #security

Ignore-AOSP-First: Already in AOSP
Change-Id: I3b7b4cbcbd292ed6fbbf9eacf3be66cf7c4120cc
Merged-In: I3b7b4cbcbd292ed6fbbf9eacf3be66cf7c4120cc
(cherry picked from commit 5fd6aecc)
(cherry picked from commit 58e62a0f89032205bd1429228f6f8d082bb9423e)