Create an empty color and motion screen with Catalyst Infra

Bug: 373451690
Test: atest ColorAndMotionScreenTest
Flag: com.android.settings.flags.catalyst_accessibility_color_and_motion
Change-Id: I4bfa5ec4d15bd745d691f586e49318b1b0a9bf6c

aconfig/catalyst/accessibility.aconfig

@@ -1,9 +1,16 @@
 package: "com.android.settings.flags"
 container: "system"
 
+flag {
+  name: "catalyst_accessibility_color_and_motion"
+  namespace: "android_settings"
+  description: "Migrate Color and motion screen to the Catalyst infrastructure"
+  bug: "323791114"
+}
+
 flag {
   name: "catalyst_text_reading_screen"
   namespace: "android_settings"
   description: "Flag for Display size and text"
   bug: "323791114"
-}
+}