Reduce an log to verbose

In AudioFlinger, we added more info to a specific failure case. This cl
removes an unnecessary log in AudioTrack to keep logs to a minimum.

Bug: 194956750
Test: mma
Change-Id: If6b61e667710f709a42e39652de914df6048f380
diff --git a/media/libaudioclient/AudioTrack.cpp b/media/libaudioclient/AudioTrack.cpp
index 5b7760b..1149790 100644
--- a/media/libaudioclient/AudioTrack.cpp
+++ b/media/libaudioclient/AudioTrack.cpp
@@ -1797,7 +1797,7 @@
                 mAwaitBoost = true;
             }
         } else {
-            ALOGD("%s(%d): AUDIO_OUTPUT_FLAG_FAST denied by server; frameCount %zu -> %zu",
+            ALOGV("%s(%d): AUDIO_OUTPUT_FLAG_FAST denied by server; frameCount %zu -> %zu",
                   __func__, mPortId, mReqFrameCount, mFrameCount);
         }
     }