Update java doc of ACTION_SETTINGS_EMBED_DEEP_LINK_ACTIVITY

To ensure developers know that the Intent only supports
on some devices.

Bug: 258549553
Test: NA
Change-Id: I09da4a4f319aa240a574552fb0deb954772acb83

core/java/android/provider/Settings.java

@@ -18441,6 +18441,9 @@ public final class Settings {
     /**
      * Activity Action: For system or preinstalled apps to show their {@link Activity} embedded
      * in Settings app on large screen devices.
+     *
+     * Developers should resolve the Intent action before using it.
+     *
      * <p>
      *     Input: {@link #EXTRA_SETTINGS_EMBEDDED_DEEP_LINK_INTENT_URI} must be included to
      * specify the intent for the activity which will be embedded in Settings app.