Increase the SHORT_DELAY amount in the JSR166 test.

Change-Id: I890621226c5ea412baee568f3e9b31833185849a
diff --git a/libcore/concurrent/src/test/java/tests/api/java/util/concurrent/JSR166TestCase.java b/libcore/concurrent/src/test/java/tests/api/java/util/concurrent/JSR166TestCase.java
index c900616..1c872f1 100644
--- a/libcore/concurrent/src/test/java/tests/api/java/util/concurrent/JSR166TestCase.java
+++ b/libcore/concurrent/src/test/java/tests/api/java/util/concurrent/JSR166TestCase.java
@@ -168,7 +168,10 @@
      * be reimplemented to use for example a Property.
      */
     protected long getShortDelay() {
-        return 50;
+        // BEGIN android-changed
+        // original value is 50
+        return 250;
+        // END android-changed
     }