Revert "Use unicast instead of broadcast as ethernet destination in test_apf_drop_ethercat"

This reverts commit 46102348e0.

Reason for revert: mistakenly submitted.

Change-Id: I6072a9828a8cc0633ca35ea2ecf7707f2b3573a1

staticlibs/testutils/host/python/apf_test_base.py

@@ -50,9 +50,6 @@ class ApfTestBase(multi_devices_test_base.MultiDevicesTestBase):
     self.server_mac_address = apf_utils.get_hardware_address(
         self.serverDevice, self.server_iface_name
     )
-    self.client_mac_address = apf_utils.get_hardware_address(
-        self.clientDevice, self.client_iface_name
-    )
 
     # Enable doze mode to activate APF.
     adb_utils.set_doze_mode(self.clientDevice, True)

tests/cts/multidevices/apfv4_test.py

@@ -53,7 +53,7 @@ class ApfV4Test(apf_test_base.ApfTestBase, parameterized.TestCase):
   )  # Declare inputs for state_str and expected_result.
   def test_apf_drop_ethertype_not_allowed(self, blocked_ether_type):
     # Ethernet header (14 bytes).
-    packet = self.client_mac_address.replace(":", "")  # Destination MAC
+    packet = ETHER_BROADCAST_ADDR  # Destination MAC (broadcast)
     packet += self.server_mac_address.replace(":", "")  # Source MAC
     packet += blocked_ether_type