Add multilang extra in ReocognizerIntent

Test: Existing tests.
Bug: 312489931
Change-Id: If8c35ac1a9b199b2af6a49610113ec87d6e270c7
diff --git a/AconfigFlags.bp b/AconfigFlags.bp
index de1a0d7..70cda8b 100644
--- a/AconfigFlags.bp
+++ b/AconfigFlags.bp
@@ -72,6 +72,7 @@
     ":android.webkit.flags-aconfig-java{.generated_srcjars}",
     ":android.provider.flags-aconfig-java{.generated_srcjars}",
     ":android.chre.flags-aconfig-java{.generated_srcjars}",
+    ":android.speech.flags-aconfig-java{.generated_srcjars}",
 ]
 
 filegroup {
@@ -913,3 +914,16 @@
     aconfig_declarations: "chre_flags",
     defaults: ["framework-minus-apex-aconfig-java-defaults"],
 }
+
+// Speech
+aconfig_declarations {
+    name: "android.speech.flags-aconfig",
+    package: "android.speech.flags",
+    srcs: ["core/java/android/speech/flags/*.aconfig"],
+}
+
+java_aconfig_library {
+    name: "android.speech.flags-aconfig-java",
+    aconfig_declarations: "android.speech.flags-aconfig",
+    defaults: ["framework-minus-apex-aconfig-java-defaults"],
+}
diff --git a/core/api/current.txt b/core/api/current.txt
index 7c34812..ea0c260 100644
--- a/core/api/current.txt
+++ b/core/api/current.txt
@@ -41552,6 +41552,8 @@
     field public static final String EXTRA_LANGUAGE_MODEL = "android.speech.extra.LANGUAGE_MODEL";
     field public static final String EXTRA_LANGUAGE_PREFERENCE = "android.speech.extra.LANGUAGE_PREFERENCE";
     field public static final String EXTRA_LANGUAGE_SWITCH_ALLOWED_LANGUAGES = "android.speech.extra.LANGUAGE_SWITCH_ALLOWED_LANGUAGES";
+    field @FlaggedApi("android.speech.flags.multilang_extra_launch") public static final String EXTRA_LANGUAGE_SWITCH_INITIAL_ACTIVE_DURATION_TIME_MILLIS = "android.speech.extra.LANGUAGE_SWITCH_INITIAL_ACTIVE_DURATION_TIME_MILLIS";
+    field @FlaggedApi("android.speech.flags.multilang_extra_launch") public static final String EXTRA_LANGUAGE_SWITCH_MAX_SWITCHES = "android.speech.extra.LANGUAGE_SWITCH_MAX_SWITCHES";
     field public static final String EXTRA_MASK_OFFENSIVE_WORDS = "android.speech.extra.MASK_OFFENSIVE_WORDS";
     field public static final String EXTRA_MAX_RESULTS = "android.speech.extra.MAX_RESULTS";
     field public static final String EXTRA_ONLY_RETURN_LANGUAGE_PREFERENCE = "android.speech.extra.ONLY_RETURN_LANGUAGE_PREFERENCE";
diff --git a/core/java/android/speech/RecognizerIntent.java b/core/java/android/speech/RecognizerIntent.java
index 118d028..1ca7ac7 100644
--- a/core/java/android/speech/RecognizerIntent.java
+++ b/core/java/android/speech/RecognizerIntent.java
@@ -16,6 +16,9 @@
 
 package android.speech;
 
+import static android.speech.flags.Flags.FLAG_MULTILANG_EXTRA_LAUNCH;
+
+import android.annotation.FlaggedApi;
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
 import android.content.BroadcastReceiver;
@@ -653,4 +656,30 @@
      */
     public static final String EXTRA_LANGUAGE_SWITCH_ALLOWED_LANGUAGES =
             "android.speech.extra.LANGUAGE_SWITCH_ALLOWED_LANGUAGES";
+
+    /**
+     * Optional integer to use for {@link #EXTRA_ENABLE_LANGUAGE_SWITCH}. If set, the language
+     * switch will be deactivated when LANGUAGE_SWITCH_MAX_SWITCHES reached.
+     *
+     * <p> Depending on the recognizer implementation, this flag may have no effect.
+     *
+     * @see #EXTRA_ENABLE_LANGUAGE_SWITCH
+     */
+    @FlaggedApi(FLAG_MULTILANG_EXTRA_LAUNCH)
+    public static final String EXTRA_LANGUAGE_SWITCH_MAX_SWITCHES =
+            "android.speech.extra.LANGUAGE_SWITCH_MAX_SWITCHES";
+
+    /**
+     * Optional integer to use for {@link #EXTRA_ENABLE_LANGUAGE_SWITCH}. If set, the language
+     * switch will only be activated for this value of ms of audio since the START_OF_SPEECH. This
+     * could provide a more stable recognition result when the language switch is only required in
+     * the beginning of the session.
+     *
+     * <p> Depending on the recognizer implementation, this flag may have no effect.
+     *
+     * @see #EXTRA_ENABLE_LANGUAGE_SWITCH
+     */
+    @FlaggedApi(FLAG_MULTILANG_EXTRA_LAUNCH)
+    public static final String EXTRA_LANGUAGE_SWITCH_INITIAL_ACTIVE_DURATION_TIME_MILLIS =
+            "android.speech.extra.LANGUAGE_SWITCH_INITIAL_ACTIVE_DURATION_TIME_MILLIS";
 }
diff --git a/core/java/android/speech/flags/speech_flags.aconfig b/core/java/android/speech/flags/speech_flags.aconfig
new file mode 100644
index 0000000..fd80127
--- /dev/null
+++ b/core/java/android/speech/flags/speech_flags.aconfig
@@ -0,0 +1,8 @@
+package: "android.speech.flags"
+
+flag {
+    name: "multilang_extra_launch"
+    namespace: "machine_learning"
+    description: "Feature flag for adding new extra for multi-lang feature"
+    bug: "312489931"
+}