Add sound trigger control by audio policy

Audio policy:
- Added active capture indication to sound trigger service:
recognition stops if concurrent capture is not supported.
- Added generation of reserved I/O handle and session ID for
utterance capture.

Sound trigger service
- Added sound model update callback handling.
- Added service state callback
- Simplified callback shared memory allocation.

Bug: 12378680.

Change-Id: Ib0292c2733e6df90fdae480633dd9953d0016ef1
diff --git a/include/soundtrigger/ISoundTriggerClient.h b/include/soundtrigger/ISoundTriggerClient.h
index 7f86d02..480429a 100644
--- a/include/soundtrigger/ISoundTriggerClient.h
+++ b/include/soundtrigger/ISoundTriggerClient.h
@@ -31,6 +31,10 @@
 
     virtual void onRecognitionEvent(const sp<IMemory>& eventMemory) = 0;
 
+    virtual void onSoundModelEvent(const sp<IMemory>& eventMemory) = 0;
+
+    virtual void onServiceStateChange(const sp<IMemory>& eventMemory) = 0;
+
 };
 
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