Implement server side playback timestamps with 64 bit accuracy

Provide server timestamps if the HAL doesn't provide it.
Provide monotonic - boottime translation.
Integrate record timestamps and playback timestamps together.

Bug: 17472992
Bug: 22871200
Bug: 26400089
Bug: 26682703
Change-Id: If1974f94232fcce7ba0bbcdf63d9e54ed51918ff
diff --git a/include/media/nbaio/AudioStreamOutSink.h b/include/media/nbaio/AudioStreamOutSink.h
index 0998d45..e86b018 100644
--- a/include/media/nbaio/AudioStreamOutSink.h
+++ b/include/media/nbaio/AudioStreamOutSink.h
@@ -47,7 +47,7 @@
 
     virtual ssize_t write(const void *buffer, size_t count);
 
-    virtual status_t getTimestamp(AudioTimestamp& timestamp);
+    virtual status_t getTimestamp(ExtendedTimestamp &timestamp);
 
     // NBAIO_Sink end