Update bluetooth preference to take user to new screen

This CL removes the toggle from the bluetooth preference and instead
takes users to a new dedicated screen for toggling bluetooth status.
On this screen we show a different summary text depending on whether
bluetooth and bluetooth scanning are on/off. Also, we were able to
delegate most of the UI/bluetooth handling to already existing
classes.

Test: robotests
Bug: 77543471
Change-Id: I036a3992bbd78896da8364b55ecc51afc4464b6e

src/com/android/settings/utils/AnnotationSpan.java

@@ -80,6 +80,7 @@ public class AnnotationSpan extends URLSpan {
      */
     public static class LinkInfo {
         private static final String TAG = "AnnotationSpan.LinkInfo";
+        public static final String DEFAULT_ANNOTATION = "link";
         private final String mAnnotation;
         private final Boolean mActionable;
         private final View.OnClickListener mListener;