Sync AAudio flowgraph with Oboe

The flowgraph code in AAudio and Oboe should be kept in parity.
The code has diverged and this cl is meant to sync them again.

Bug: 208689965
Test: Build libaaudio/oboeservice and test changes
Change-Id: I1e0cf04120305ffcb1e64df1930ffa079d3c4a94
diff --git a/media/libaaudio/src/flowgraph/SinkI32.h b/media/libaaudio/src/flowgraph/SinkI32.h
index 09d23b7..7456d5f 100644
--- a/media/libaaudio/src/flowgraph/SinkI32.h
+++ b/media/libaaudio/src/flowgraph/SinkI32.h
@@ -19,16 +19,20 @@
 
 #include <stdint.h>
 
-#include "AudioProcessorBase.h"
+#include "FlowGraphNode.h"
 
 namespace flowgraph {
 
-class SinkI32 : public AudioSink {
+class SinkI32 : public FlowGraphSink {
 public:
     explicit SinkI32(int32_t channelCount);
     ~SinkI32() override = default;
 
     int32_t read(void *data, int32_t numFrames) override;
+
+    const char *getName() override {
+        return "SinkI32";
+    }
 };
 
 } /* namespace flowgraph */