Shorten the sleep duration for LAUNCH BROWSER command

Currently ServiceHandler sleeps 10 seconds right after broadcasting an
intent to launch a browser application, but 10 seconds is too long and
ServiceHandler cannot handle next user operation if user comes back from
the browser application to the STK application quickly.
To fix the issue, shorten the sleep duration.

Bug: 29863555
Change-Id: Ia0e6af5bca42f174675df6dad51de91002f5e795
diff --git a/src/com/android/stk/StkAppService.java b/src/com/android/stk/StkAppService.java
index ccf5a20..011e148 100644
--- a/src/com/android/stk/StkAppService.java
+++ b/src/com/android/stk/StkAppService.java
@@ -1527,7 +1527,7 @@
         // this is good for scenarios where a related DISPLAY TEXT command is
         // followed immediately.
         try {
-            Thread.sleep(10000);
+            Thread.sleep(3000);
         } catch (InterruptedException e) {}
     }