BpfMapTest - adjust paths for bpfloader change

that puts tethering mainline module maps and programs
under /sys/fs/bpf/tethering

Test: builds, boots, atest, TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: If57e737168cefe9fe0fe180114c1d61918d20d21
diff --git a/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java b/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
index 04c1f00..dba8fab 100644
--- a/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
+++ b/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
@@ -52,7 +52,7 @@
     // Sync from packages/modules/Connectivity/Tethering/bpf_progs/offload.c.
     private static final int TEST_MAP_SIZE = 16;
     private static final String TETHER_INGRESS_FS_PATH =
-            "/sys/fs/bpf/map_test_tether_ingress_map";
+            "/sys/fs/bpf/tethering/map_test_tether_ingress_map";
 
     private ArrayMap<TetherIngressKey, TetherIngressValue> mTestData;