Use LOG_ALWAYS_FATAL instead of LOG_FATAL

LOG_FATAL is compiled out in most builds, so the
assertion checks were not being performed.

Change-Id: I774f0985ab9c5ccecd8989a0f1c940386b73fc35
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index 9fe459b..2cf10e2 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -1525,7 +1525,7 @@
             mTrimQueueHeadOnRelease = false;
         }
     } else {
-        LOG_FATAL("TimedTrack::releaseBuffer of non-silence buffer with no"
+        LOG_ALWAYS_FATAL("TimedTrack::releaseBuffer of non-silence buffer with no"
                   " buffers in the timed buffer queue");
     }