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/ExtendedAudioBufferProvider.h b/include/media/ExtendedAudioBufferProvider.h
index 2539ed3..168ceed 100644
--- a/include/media/ExtendedAudioBufferProvider.h
+++ b/include/media/ExtendedAudioBufferProvider.h
@@ -27,11 +27,11 @@
     virtual size_t  framesReady() const = 0;  // see description at AudioFlinger.h
 
     // Return the total number of frames that have been obtained and released
-    virtual size_t  framesReleased() const { return 0; }
+    virtual int64_t  framesReleased() const { return 0; }
 
     // Invoked by buffer consumer when a new timestamp is available.
     // Default implementation ignores the timestamp.
-    virtual void    onTimestamp(const AudioTimestamp& timestamp) { }
+    virtual void    onTimestamp(const ExtendedTimestamp& timestamp) { }
 };
 
 }   // namespace android