Remove unknown connection token from Anr tracker

This CL deletes connection token from ANR tracker if it is not found in
Connections Manager. This prevents same error from being logged multiple
times and spanning logcat.

Bug: 389067592
Bug: 245989146
Test: atest inputflinger_tests
Flag: EXEMPT refactor
Change-Id: I6e3b959df0a3f31893b990d27284401c3a4d029b