OboeTester: share WAVE from glitch test

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MultiChannelRecording wraps and save last recorded audio.
diff --git a/apps/OboeTester/app/src/main/cpp/FullDuplexAnalyzer.h b/apps/OboeTester/app/src/main/cpp/FullDuplexAnalyzer.h
index 0b7ce9f..b323ffb 100644
--- a/apps/OboeTester/app/src/main/cpp/FullDuplexAnalyzer.h
+++ b/apps/OboeTester/app/src/main/cpp/FullDuplexAnalyzer.h
@@ -23,6 +23,7 @@
 #include "oboe/Oboe.h"
 #include "FullDuplexStream.h"
 #include "LatencyAnalyzer.h"
+#include "MultiChannelRecording.h"
 
 class FullDuplexAnalyzer : public FullDuplexStream {
 public:
@@ -47,6 +48,13 @@
 
     virtual LoopbackProcessor *getLoopbackProcessor() = 0;
 
+    void setRecording(MultiChannelRecording *recording) {
+        mRecording = recording;
+    }
+
+private:
+    MultiChannelRecording  *mRecording = nullptr;
+
 };