bpf_base_test - usleep sleeps microseconds not miliseconds

Fix some
  netd_integration_test32.BpfBasicTest#TestCloseSocketWithoutUntag
flakiness:
  system/netd/tests/bpf_base_test.cpp:144: Failure
  Failed
  socket tag still exist after 500ms

Test: atest libbpf_android_test libnetdbpf_test netd_integration_test netd_unit_test netdutils_test resolv_integration_test resolv_unit_test
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I311d6acff1d2d34235169a30c6dc8ff14a361499
diff --git a/tests/bpf_base_test.cpp b/tests/bpf_base_test.cpp
index f9b07e5..a75fd5b 100644
--- a/tests/bpf_base_test.cpp
+++ b/tests/bpf_base_test.cpp
@@ -139,9 +139,9 @@
             ASSERT_EQ(ENOENT, tagResult.status().code());
             return;
         }
-        usleep(50);
+        usleep(5000);  // 5ms
     }
-    FAIL() << "socket tag still exist after 500ms";
+    FAIL() << "socket tag still exist after 50ms";
 }
 
 TEST_F(BpfBasicTest, TestChangeCounterSet) {