Whitelist getTimestamp from integer sanitization

The timestamp math relies on modulo 32 bit math, whitelist this function
for now until we can find a better way to tackle this.

Bug: 25490803
Change-Id: I3e2b19db023b4622f5884933feab96363756e8c6
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index a161e9a..7380418 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -2192,6 +2192,7 @@
     return mAudioTrack->setParameters(keyValuePairs);
 }
 
+__attribute__((no_sanitize("integer")))
 status_t AudioTrack::getTimestamp(AudioTimestamp& timestamp)
 {
     AutoMutex lock(mLock);