Revert "Fix Audioflinger crash when TeeSink is enabled"

This reverts commit 84e391686d7eced293913d1d7993721224ee0ba1.

Bug: 8834855
Change-Id: I8211ef5ea5d87d97ada115723df31c8057f38ca8
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index b640b31..2df9173 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -594,12 +594,11 @@
     status_t    closeOutput_nonvirtual(audio_io_handle_t output);
     status_t    closeInput_nonvirtual(audio_io_handle_t input);
 
-// do not use #ifdef here, since AudioFlinger.h is included by more than one module
-//#ifdef TEE_SINK
+#ifdef TEE_SINK
     // all record threads serially share a common tee sink, which is re-created on format change
     sp<NBAIO_Sink>   mRecordTeeSink;
     sp<NBAIO_Source> mRecordTeeSource;
-//#endif
+#endif
 
 public: