Messaging: Convert further parts to androidx

CursorLoader, LoaderManager, Preferences, Fragments, ...

Change-Id: I8787b2db365249839547c6d5c21ab7cd5ff42082

src/com/android/messaging/ui/CursorRecyclerAdapter.java

@@ -25,6 +25,7 @@ import android.os.Handler;
 
 import androidx.annotation.NonNull;
 import androidx.recyclerview.widget.RecyclerView;
+
 import android.util.Log;
 import android.view.ViewGroup;
 import android.widget.FilterQueryProvider;
@@ -85,7 +86,8 @@ public abstract class CursorRecyclerAdapter<VH extends RecyclerView.ViewHolder>
      * @deprecated This option is discouraged, as it results in Cursor queries
      * being performed on the application's UI thread and thus can cause poor
      * responsiveness or even Application Not Responding errors.  As an alternative,
-     * use {@link android.app.LoaderManager} with a {@link android.content.CursorLoader}.
+     * use {@link androidx.loader.app.LoaderManager} with a
+     * {@link androidx.loader.content.CursorLoader}.
      */
     @Deprecated
     public static final int FLAG_AUTO_REQUERY = 0x01;