Add debug logs to CaptivePortalTests

The point is to help with debugging flakes of this test by
clarifying the timing of these calls with respect to when
NetworkMonitor reads the settings and the values it obtains.

Test: CaptivePortalTest
Change-Id: I29ac1d8cff1f96c91be2459e9a8f34f8ba1f38e3
diff --git a/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt b/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt
index 9f079c4..9f98e3f 100644
--- a/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt
+++ b/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt
@@ -46,6 +46,7 @@
 import android.provider.DeviceConfig
 import android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY
 import android.text.TextUtils
+import android.util.Log
 import androidx.test.platform.app.InstrumentationRegistry.getInstrumentation
 import androidx.test.runner.AndroidJUnit4
 import com.android.testutils.RecorderCallback
@@ -79,6 +80,8 @@
 private const val WIFI_CONNECT_TIMEOUT_MS = 120_000L
 private const val TEST_TIMEOUT_MS = 10_000L
 
+private const val TAG = "CaptivePortalTest"
+
 private fun <T> CompletableFuture<T>.assertGet(timeoutMs: Long, message: String): T {
     try {
         return get(timeoutMs, TimeUnit.MILLISECONDS)
@@ -155,6 +158,7 @@
         server.addResponse(Request(TEST_HTTP_URL_PATH), Status.REDIRECT, headers)
         setHttpsUrlDeviceConfig(makeUrl(TEST_HTTPS_URL_PATH))
         setHttpUrlDeviceConfig(makeUrl(TEST_HTTP_URL_PATH))
+        Log.d(TAG, "Set portal URLs to $TEST_HTTPS_URL_PATH and $TEST_HTTP_URL_PATH")
         // URL expiration needs to be in the next 10 minutes
         assertTrue(WIFI_CONNECT_TIMEOUT_MS < TimeUnit.MINUTES.toMillis(10))
         setUrlExpirationDeviceConfig(System.currentTimeMillis() + WIFI_CONNECT_TIMEOUT_MS)