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

Author: Arpit Singh

services/inputflinger/dispatcher/InputDispatcher.cpp

@@ -1092,6 +1092,9 @@ nsecs_t InputDispatcher::processAnrsLocked() {
             mConnectionManager.getConnection(mAnrTracker.firstToken());
     if (connection == nullptr) {
         ALOGE("Could not find connection for entry %" PRId64, mAnrTracker.firstTimeout());
+        // As we no longer have entry for this connection, remove it form Anr tracker to prevent
+        // samme error being logged multiple times.
+        mAnrTracker.eraseToken(mAnrTracker.firstToken());
         return nextAnrCheck;
     }
     connection->responsive = false;