Add HOTWORD as an AudioSource

- This is a low-priority source that can be preempted by others
- This is required for scenarios where someone wants an alway-on
  graceful microphone

Bug: 10640877.

Change-Id: Idb3577541103717cb713a7a93d3762ad2c2f4710
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 2e47928..019295d 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2071,6 +2071,14 @@
         android:description="@string/permdesc_captureAudioOutput"
         android:protectionLevel="signature|system" />
 
+    <!-- Allows an application to capture audio for hotword detection.
+         <p>Not for use by third-party applications.</p>
+         @hide -->
+    <permission android:name="android.permission.CAPTURE_AUDIO_HOTWORD"
+        android:label="@string/permlab_captureAudioHotword"
+        android:description="@string/permdesc_captureAudioHotword"
+        android:protectionLevel="signature|system" />
+
     <!-- Allows an application to capture video output.
          <p>Not for use by third-party applications.</p> -->
     <permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT"