HIDL multithreaded: increase timeout duration

This was flaking in infra. I wasn't able to reproduce
offline. Yes, this code directly affects a test in
system/tools/hidl git project.

Bug: 309428730
Test: atest hidl_test
Change-Id: Id8eef9f84f208d5c5de739869fe56603da9dc141
diff --git a/tests/multithread/1.0/default/Multithread.h b/tests/multithread/1.0/default/Multithread.h
index 0d4a007..7df75cc 100644
--- a/tests/multithread/1.0/default/Multithread.h
+++ b/tests/multithread/1.0/default/Multithread.h
@@ -33,7 +33,7 @@
     std::condition_variable mCv;
     std::mutex mCvMutex;
 
-    static constexpr auto kTimeoutDuration = 100ms;
+    static constexpr auto kTimeoutDuration = 1000ms;
 };
 
 extern "C" IMultithread* HIDL_FETCH_IMultithread(const char* name);