Add training data egress flag for Hotword Detection Service

Change-Id: Ib6a163cb9f3d9bffdfee7421639145ba95e9c9e1
Test: presubmit
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index 95b6155..931e97e 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -40,6 +40,7 @@
     ":android.app.flags-aconfig-java{.generated_srcjars}",
     ":android.credentials.flags-aconfig-java{.generated_srcjars}",
     ":android.view.contentprotection.flags-aconfig-java{.generated_srcjars}",
+    ":android.service.voice.flags-aconfig-java{.generated_srcjars}",
 ]
 
 filegroup {
@@ -383,3 +384,16 @@
     aconfig_declarations: "android.view.contentprotection.flags-aconfig",
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
+
+// Voice
+aconfig_declarations {
+    name: "android.service.voice.flags-aconfig",
+    package: "android.service.voice.flags",
+    srcs: ["core/java/android/service/voice/flags/*.aconfig"],
+}
+
+java_aconfig_library {
+    name: "android.service.voice.flags-aconfig-java",
+    aconfig_declarations: "android.service.voice.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
diff --git a/core/java/android/service/voice/flags/flags.aconfig b/core/java/android/service/voice/flags/flags.aconfig
new file mode 100644
index 0000000..c414ef8
--- /dev/null
+++ b/core/java/android/service/voice/flags/flags.aconfig
@@ -0,0 +1,8 @@
+package: "android.service.voice.flags"
+
+flag {
+    name: "allow_training_data_egress_from_hds"
+    namespace: "machine_learning"
+    description: "This flag allows the hotword detection service to egress training data to the default assistant."
+    bug: "296074924"
+}