core: fix outlier detection default ejection time (#9889)

diff --git a/core/src/main/java/io/grpc/util/OutlierDetectionLoadBalancer.java b/core/src/main/java/io/grpc/util/OutlierDetectionLoadBalancer.java
index e7d93d9..4f74fbf 100644
--- a/core/src/main/java/io/grpc/util/OutlierDetectionLoadBalancer.java
+++ b/core/src/main/java/io/grpc/util/OutlierDetectionLoadBalancer.java
@@ -880,7 +880,7 @@
     public static class Builder {
       Long intervalNanos = 10_000_000_000L; // 10s
       Long baseEjectionTimeNanos = 30_000_000_000L; // 30s
-      Long maxEjectionTimeNanos = 30_000_000_000L; // 30s
+      Long maxEjectionTimeNanos = 300_000_000_000L; // 300s
       Integer maxEjectionPercent = 10;
       SuccessRateEjection successRateEjection;
       FailurePercentageEjection failurePercentageEjection;