Add feature flag for Dynamic Android

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

Change-Id: I46efd27a6880dde4bc69aa457a6f3b0fdd9ce5cd
diff --git a/core/java/android/util/FeatureFlagUtils.java b/core/java/android/util/FeatureFlagUtils.java
index 67a4015..67c1a42 100644
--- a/core/java/android/util/FeatureFlagUtils.java
+++ b/core/java/android/util/FeatureFlagUtils.java
@@ -56,6 +56,7 @@
         DEFAULT_FLAGS.put("settings_systemui_theme", "true");
         DEFAULT_FLAGS.put("settings_wifi_mac_randomization", "true");
         DEFAULT_FLAGS.put("settings_mainline_module", "false");
+        DEFAULT_FLAGS.put("settings_dynamic_android", "false");
         DEFAULT_FLAGS.put(SEAMLESS_TRANSFER, "false");
         DEFAULT_FLAGS.put(HEARING_AID_SETTINGS, "false");
         DEFAULT_FLAGS.put(SAFETY_HUB, "false");