Log more if network request failed (#233)

Log more info when network request failed .

Author: weihao-statsig

Diff for: src/main/kotlin/com/statsig/sdk/StatsigNetwork.kt

@@ -256,7 +256,10 @@ internal class StatsigNetwork(
                         if (response.isSuccessful) {
                             return@coroutineScope
                         } else if (!retryCodes.contains(response.code) || currRetry == 0) {
+                            options.customLogger.warning("[Statsig]: Network request failed with status code: ${response.code}")
                             return@coroutineScope
+                        } else if (retryCodes.contains(response.code) && currRetry > 0) {
+                            options.customLogger.info("[Statsig]: Retrying network request. Retry count: $currRetry. Response code: ${response.code}")
                         }
                     }
                 } catch (e: Exception) {

Diff for: src/test/java/com/statsig/sdk/CustomLoggerTest.kt

@@ -25,6 +25,6 @@ class CustomLoggerTest {
         assert(warningMessage.size == 1)
         server.shutdown()
         server.checkGate(StatsigUser("user_id"), "test_gate")
-        assert(warningMessage.size == 2)
+        assert(warningMessage.size == 3)
     }
 }