Change default sampling interval to 1000 samples/sec.

Change-Id: Ib92aee8a91ac9d6702a1cec58130e346fd3fcade
diff --git a/runtime/trace.cc b/runtime/trace.cc
index 3a8ba62..4c092fd 100644
--- a/runtime/trace.cc
+++ b/runtime/trace.cc
@@ -124,7 +124,7 @@
 Trace* volatile Trace::the_trace_ = NULL;
 // TODO: Add way to enable sampling and set interval through gui.
 bool Trace::sampling_enabled_ = true;
-uint32_t Trace::sampling_interval_us_ = 10000;
+uint32_t Trace::sampling_interval_us_ = 1000;
 pthread_t Trace::sampling_pthread_ = 0U;
 UniquePtr<std::vector<mirror::ArtMethod*> > Trace::temp_stack_trace_;