chore: fix mypy type issue

Signed-off-by: Fritz Lehnert <Fritz.Lehnert@tngtech.com>

lte/gateway/python/magma/kernsnoopd/handlers.py

@@ -17,6 +17,7 @@
 from functools import lru_cache
 from socket import AF_INET, AF_INET6, inet_ntop
 from struct import pack
+from typing import Tuple
 
 import psutil
 from magma.kernsnoopd import metrics
@@ -92,7 +93,7 @@ def _get_cmdline(self, pid: int) -> list:
         return psutil.Process(pid=pid).cmdline()
 
     @lru_cache(maxsize=1024)
-    def _ip_addr_to_str(self, family: int, daddr: (int, int)) -> str:
+    def _ip_addr_to_str(self, family: int, daddr: Tuple[int, int]) -> str:  # type: ignore[return]
         """
         _ip_addr_to_str returns a string representation of an IPv4 or IPv6
         address. It caches results in an LRU cache to reduce cost of conversion

lte/gateway/python/magma/kernsnoopd/snooper.py

@@ -12,6 +12,7 @@
 """
 import logging
 import os
+from typing import Any, List
 
 from bcc import BPF  # pylint:disable=import-error
 from jinja2 import Template
@@ -65,7 +66,7 @@ def __init__(
 
         super().__init__(interval=collect_interval, loop=service_loop)
         self._bpf = None
-        self._handlers = []
+        self._handlers: List[Any] = []
         self._loop = service_loop
         self._ebpf_programs = programs
         self._service_registry = service_registry