Add feature flag for Dynamic Android

Bug: 119647479
Test: flashall and check the option exists.

Merged-In: I46efd27a6880dde4bc69aa457a6f3b0fdd9ce5cd
Change-Id: I46efd27a6880dde4bc69aa457a6f3b0fdd9ce5cd

core/java/android/util/FeatureFlagUtils.java

@@ -47,6 +47,7 @@ public class FeatureFlagUtils {
         DEFAULT_FLAGS.put("settings_data_usage_v2", "true");
         DEFAULT_FLAGS.put("settings_audio_switcher", "true");
         DEFAULT_FLAGS.put("settings_systemui_theme", "true");
+        DEFAULT_FLAGS.put("settings_dynamic_android", "false");
         DEFAULT_FLAGS.put(HEARING_AID_SETTINGS, "false");
         DEFAULT_FLAGS.put(SAFETY_HUB, "false");
     }