Increase callback waiting time to fix test flakiness.

1s buffer is not long enough if the DUT is running very slowly. We are still seeing Presubmit flakiness with 1s timeout.

Change-Id: I0560f05aa23addadebf71d78a45dce6ee947120e
Flag: EXEMPT test
Tests: Presubmit
Bug: b/385998282
diff --git a/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp b/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp
index ad34a4c..0af9a9a 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp
+++ b/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp
@@ -1850,8 +1850,8 @@
 
     auto maybeResults = getCallback()->nextOnPropertyEventResults();
     size_t retryCount = 0;
-    // Add a 1s (100ms * 10) buffer time.
-    while (!maybeResults.has_value() && retryCount < 10) {
+    // Add a 10s (100ms * 100) buffer time.
+    while (!maybeResults.has_value() && retryCount < 100) {
         retryCount++;
         std::this_thread::sleep_for(std::chrono::milliseconds(100));
     }