Add link to CDM profiles info to javadoc

Bug: 165951651
Test: presubmit

Change-Id: I544d29af20edfd6bc4c94b2158aa7b5b34d6f122
diff --git a/core/java/android/companion/AssociationRequest.java b/core/java/android/companion/AssociationRequest.java
index b07d6d5..7956be3 100644
--- a/core/java/android/companion/AssociationRequest.java
+++ b/core/java/android/companion/AssociationRequest.java
@@ -67,6 +67,9 @@
      * Using it requires declaring uses-permission
      * {@link android.Manifest.permission#REQUEST_COMPANION_PROFILE_WATCH} in the manifest.
      *
+     * <a href="{@docRoot}about/versions/12/features#cdm-profiles">Learn more</a>
+     * about device profiles.
+     *
      * @see AssociationRequest.Builder#setDeviceProfile
      */
     public static final String DEVICE_PROFILE_WATCH = "android.app.role.COMPANION_DEVICE_WATCH";