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
1 file changed