Revert "Deprecate support for legacy effect config file audio_effects.conf"

This reverts commit c11621e64e3a009fe88a8a3ba1dffab5d9828601.

Reason for revert: The legacy effect config parsing logic will be kept in the framework for now, but we will add metrics to track any possible partner usage of the config file.

Change-Id: I873e2e18924688df52c9ed761950f132d16dcc29
diff --git a/services/audiopolicy/service/AudioPolicyService.h b/services/audiopolicy/service/AudioPolicyService.h
index 6cac9f9..4710a8a 100644
--- a/services/audiopolicy/service/AudioPolicyService.h
+++ b/services/audiopolicy/service/AudioPolicyService.h
@@ -1072,7 +1072,7 @@
     Mutex mNotificationClientsLock;
     DefaultKeyedVector<int64_t, sp<NotificationClient>> mNotificationClients
         GUARDED_BY(mNotificationClientsLock);
-    // Manage all effects configured in audio_effects.xml
+    // Manage all effects configured in audio_effects.conf
     // never hold AudioPolicyService::mLock when calling AudioPolicyEffects methods as
     // those can call back into AudioPolicyService methods and try to acquire the mutex
     sp<AudioPolicyEffects> mAudioPolicyEffects GUARDED_BY(mLock);