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/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 200c561..778eb9a 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -1679,7 +1679,7 @@
 
 ssize_t MediaPlayerService::AudioOutput::write(const void* buffer, size_t size)
 {
-    LOG_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
+    LOG_ALWAYS_FATAL_IF(mCallback != NULL, "Don't call write if supplying a callback.");
 
     //ALOGV("write(%p, %u)", buffer, size);
     if (mTrack != 0) {