Revert "Ignore @FlaggedApi annotated API in udc mainline branch"

This reverts commit 9ee37a0e60b6e9eddeb92aca1d0b6ec8bd87bdc6.

Reason for revert: API files are not correct in udc-mainline-prod

Change-Id: Ief0a79883bcc2c5493807c548cb71ef655abed23
diff --git a/framework/Android.bp b/framework/Android.bp
index 655a32c..182c558 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -22,10 +22,6 @@
 // In the branch which does not support FlaggedAPI, use this default to ignore the annotated APIs.
 java_defaults {
     name: "FlaggedApiDefaults",
-    api_dir: "udc-extended-api",
-    droiddoc_options: [
-      "--hide-annotation android.annotation.FlaggedApi",
-    ],
 }
 
 // The above variables may have different values