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/services/audiopolicy/AudioPolicyClientImpl.cpp b/services/audiopolicy/AudioPolicyClientImpl.cpp
index c0019d1..3e090e9 100644
--- a/services/audiopolicy/AudioPolicyClientImpl.cpp
+++ b/services/audiopolicy/AudioPolicyClientImpl.cpp
@@ -17,6 +17,7 @@
 #define LOG_TAG "AudioPolicyClientImpl"
 //#define LOG_NDEBUG 0
 
+#include <soundtrigger/SoundTrigger.h>
 #include <utils/Log.h>
 #include "AudioPolicyService.h"