Add tests for getApfEtherTypeBlackList and getApfDrop8023Frames APIs.
Bug: 150640397
Test: atest CtsNetTestCasesLatestSdk:android.net.apf.ApfCapabilitiesTest
on both of Q and R devices.
Change-Id: I11555934df4b27cbb6b7ddbb81022d8fb7c25e15
Merged-In: I11555934df4b27cbb6b7ddbb81022d8fb7c25e15
(cherry picked from commit 7d51a72487dba5b2747a9de12f50ba2087007264)