SoundTrigger API improvements.

This CL implements the SoundTrigger API improvements as given in b/22860713. Only the java-level
parts are implemented in this CL.

Key changes include:

* Addition of a SoundTriggerManager/SoundTriggerDetector system API to manage
  the sound-trigger based sound models.
* Addition of a SoundTriggerService service that manages all sound models
  including voice (keyphrase) and sound-trigger based models.
* Includes logic to write sound-trigger based models to the database.
* VoiceInteractionManager service now uses SoundTriggerService instead of
  SoundTriggerHelper.

Bug: 22860713
Change-Id: I7b5c0ed80702527c4460372efeb5e542d3693a69
diff --git a/tests/SoundTriggerTestApp/Android.mk b/tests/SoundTriggerTestApp/Android.mk
new file mode 100644
index 0000000..7bcab5e
--- /dev/null
+++ b/tests/SoundTriggerTestApp/Android.mk
@@ -0,0 +1,12 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-subdir-java-files)
+
+LOCAL_PACKAGE_NAME := SoundTriggerTestApp
+
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PRIVILEGED_MODULE := true
+
+include $(BUILD_PACKAGE)