Switch the adb-over-ip check to an existing method

It internally performs the exact check.

Bug: 272823919
Test: atest AVFHostTestCase
Change-Id: Ie9f987a52eb76c44d692d48f82b3a6f3de7065a5
diff --git a/tests/benchmark_hostside/java/android/avf/test/AVFHostTestCase.java b/tests/benchmark_hostside/java/android/avf/test/AVFHostTestCase.java
index 73c3b33..7441149 100644
--- a/tests/benchmark_hostside/java/android/avf/test/AVFHostTestCase.java
+++ b/tests/benchmark_hostside/java/android/avf/test/AVFHostTestCase.java
@@ -488,8 +488,7 @@
         // different serial for fastboot. But there's no good way to distinguish from regular IP
         // transport. This is currently not a problem until someone really needs to run the test
         // over regular IP transport.
-        boolean isAdbOverIp = getDevice().getSerialNumber().contains(":");
-        assumeFalse("Skip over IP (overkill for remote_device_proxy)", isAdbOverIp);
+        assumeFalse("Skip over IP (overkill for remote_device_proxy)", getDevice().isAdbTcp());
 
         if (!getDevice().isStateBootloaderOrFastbootd()) {
             getDevice().rebootIntoBootloader();