Include settings flags into flags_packages

Required for resource & manifest flags.

Bug: 332202168
Flag: EXEMPT Modify Android.bp
Test: Set android:featureFlag to manifest Service locally
Change-Id: Iaf02e494b1a23b92616a5ff5e8fb84e93b4a340e

Android.bp

@@ -130,6 +130,7 @@ android_library {
         "ims-common",
     ],
     flags_packages: [
+        "aconfig_settings_flags",
         "android.app.flags-aconfig",
     ],
 }