Add uid to audioflinger track dumps

Helpful for debugging app-specific activity.

Test: adb shell dumpsys media.audio_flinger
Flag: EXEMPT logs only
Bug: 372070273
Change-Id: I0d18de57d43b7fdd1bc6d59c40883433490b9650
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index 6d3eea5..2bc18ee 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -728,7 +728,8 @@
                 // Audio data transfer is directly handled by the client creating the MMAP stream
     DefaultKeyedVector<audio_io_handle_t, sp<IAfMmapThread>> mMmapThreads GUARDED_BY(mutex());
 
-    sp<Client> registerPid(pid_t pid) EXCLUDES_AudioFlinger_ClientMutex; // always returns non-0
+    // always returns non-null
+    sp<Client> registerClient(pid_t pid, uid_t uid) EXCLUDES_AudioFlinger_ClientMutex;
 
     sp<IAfEffectHandle> createOrphanEffect_l(const sp<Client>& client,
                                           const sp<media::IEffectClient>& effectClient,