Add ENABLE_ACCESSIBILITY_AUDIO_DESCRIPTION_BY_DEFAULT to Setting.Global

to store the settings preference of audio description.

Test: local test.
Bug: 160823970
Change-Id: I22e29cd5269db14bc8a535d01a38966a84edda9a

core/java/android/provider/Settings.java

@@ -10275,6 +10275,14 @@ public final class Settings {
         public static final String ENABLE_ACCESSIBILITY_GLOBAL_GESTURE_ENABLED =
                 "enable_accessibility_global_gesture_enabled";
 
+        /**
+         * Whether select sound track with audio description by default.
+         * @hide
+         */
+        @Readable
+        public static final String ENABLE_ACCESSIBILITY_AUDIO_DESCRIPTION_BY_DEFAULT =
+                "enable_accessibility_audio_description_by_default";
+
         /**
          * Whether Airplane Mode is on.
          */

packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java

@@ -269,6 +269,7 @@ public class SettingsBackupTest {
                     Settings.Global.DYNAMIC_POWER_SAVINGS_DISABLE_THRESHOLD,
                     Settings.Global.SMART_REPLIES_IN_NOTIFICATIONS_FLAGS,
                     Settings.Global.SMART_SUGGESTIONS_IN_NOTIFICATIONS_FLAGS,
+                    Settings.Global.ENABLE_ACCESSIBILITY_AUDIO_DESCRIPTION_BY_DEFAULT,
                     Settings.Global.ENABLE_ADB_INCREMENTAL_INSTALL_DEFAULT,
                     Settings.Global.ENABLE_MULTI_SLOT_TIMEOUT_MILLIS,
                     Settings.Global.ENHANCED_4G_MODE_ENABLED,