Fix misc-macro-parentheses warnings in Tracks.cpp.

Bug: 28705665
Change-Id: Ifa59d95b0242bef71762d862e3437fa1e914c552
diff --git a/services/audioflinger/Tracks.cpp b/services/audioflinger/Tracks.cpp
index 7bcb721..747b464 100644
--- a/services/audioflinger/Tracks.cpp
+++ b/services/audioflinger/Tracks.cpp
@@ -52,7 +52,7 @@
 
 // TODO move to a common header  (Also shared with AudioTrack.cpp)
 #define NANOS_PER_SECOND    1000000000
-#define TIME_TO_NANOS(time) ((uint64_t)time.tv_sec * NANOS_PER_SECOND + time.tv_nsec)
+#define TIME_TO_NANOS(time) ((uint64_t)(time).tv_sec * NANOS_PER_SECOND + (time).tv_nsec)
 
 namespace android {