Adding property in developer options UI to control the display message during user switch

Bug: 145915635
Test: Manual Testing
      (to check the property) adb shell settings get global android.car.ENABLE_USER_SWITCH_DEVELOPER_MESSAGE

Change-Id: I55bf20b92ed16531b925c4cd8e59502bb0e1b014
diff --git a/car-lib/Android.bp b/car-lib/Android.bp
index adec1a5..df7c3b7 100644
--- a/car-lib/Android.bp
+++ b/car-lib/Android.bp
@@ -65,6 +65,12 @@
     srcs: ["src/android/car/navigation/navigation_state.proto"]
 }
 
+// library to access settings from CarSettings 
+java_library {
+    name: "android.car.settings",
+    srcs: ["src/android/car/settings/CarSettings.java"]
+}
+
 java_library {
     name: "android.car",
     srcs: [