Android: Add more info for createPbufferSurface() exceptions

webrtc/api/java/android/org/webrtc/ThreadUtils.java

Index: webrtc/api/java/android/org/webrtc/ThreadUtils.java
diff --git a/webrtc/api/java/android/org/webrtc/ThreadUtils.java b/webrtc/api/java/android/org/webrtc/ThreadUtils.java
index 68b52d3e15589d2f7d73950b2a9b7703ce5d8875..8eeebc84dc2c0dd57eecc2c02c2ff3c8fc1252cd 100644
--- a/webrtc/api/java/android/org/webrtc/ThreadUtils.java
+++ b/webrtc/api/java/android/org/webrtc/ThreadUtils.java
@@ -150,7 +150,10 @@ public class ThreadUtils {
         try {
           result.value = callable.call();
         } catch (Exception e) {
-          throw new RuntimeException("Callable threw exception: " + e);
+          final RuntimeException runtimeException =
+              new RuntimeException("Callable threw exception: " + e);
+          runtimeException.setStackTrace(e.getStackTrace());
+          throw runtimeException;
         }
         barrier.countDown();
       }