Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

Test: none
Bug: 168334533
Exempt-From-Owner-Approval: docs updates
Change-Id: I53003332717baf57dc088b2f6b969cdb1863f65e

core/java/android/net/apf/ApfCapabilities.java

@@ -127,7 +127,7 @@ public final class ApfCapabilities implements Parcelable {
     }
 
     /**
-     * @return An array of blacklisted EtherType, packets with EtherTypes within it will be dropped.
+     * @return An array of denylisted EtherType, packets with EtherTypes within it will be dropped.
      */
     public static @NonNull int[] getApfEtherTypeBlackList() {
         return Resources.getSystem().getIntArray(R.array.config_apfEthTypeBlackList);