Implement the soundtrigger_middlewware service

This service is intended to replace:
frameworks/av/include/soundtrigger/ISoundTriggerHwService.h

This change only adds the replacement service, follow up
changes migrate the clients to use the new service and remove
the old one. The new service is feature-equivalent to the new
one, but offers the following advantages:
- AIDL interface (as opposed to hand-written parceling code).
- Pure Java implementation all the way to the HAL.
- Better documentation.
- Rigorous error handling.
- Unit tests.
- Reduced code complexity (less layers, better separation of
  concerns).
- Permission-based security model (as opposed to some baked-in
  assumptions about process affinity).

Change-Id: I79f4eff105d3e6245990be068b933d4d48c35a0d
Bug: 142070343

1 files changed, 9 insertions, 0 deletions

diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index 7b580c3bde79..671b589a881a 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -4325,6 +4325,15 @@ public abstract class Context {
     public static final String SOUND_TRIGGER_SERVICE = "soundtrigger";
 
     /**
+     * Use with {@link #getSystemService(String)} to access the
+     * {@link com.android.server.soundtrigger_middleware.SoundTriggerMiddlewareService}.
+     *
+     * @hide
+     * @see #getSystemService(String)
+     */
+    public static final String SOUND_TRIGGER_MIDDLEWARE_SERVICE = "soundtrigger_middleware";
+
+    /**
      * Official published name of the (internal) permission service.
      *
      * @see #getSystemService(String)