commit 4270f72586322ad9f925d58ecd38db2908e2e607
author Ken Chen <cken@google.com> Sat Oct 29 21:57:24 2022 +0800
committer Ken Chen <cken@google.com> Sun Oct 30 14:19:47 2022 +0800
tree fdeda003d944ece3c799044bdb9f0ceef4574cf2
parent c4e3ba700e6b31c4eace1734315e84fc942e10a5

Fix spurious mutex lock in MDnsEventReporter

The mEventListeners needs to be protected by lock. There are 4 places
use it without acquiring a mutex lock.

- MDnsSdListenerDiscoverCallback
- MDnsSdListenerRegisterCallback
- MDnsSdListenerResolveCallback
- MDnsSdListenerGetAddrInfoCallback

Although there is a std::lock_guard in the getEventListenersImpl(), the
lock is auto-released when leaving the function.

Bug: 256046108
Test: atest
Change-Id: I00c57c111e03481a6defba6a94ffc1ebd58d73d2