Fix handleGettingEabContactCommand return null

In aosp/1565197, accidentally delete getOutPrintWriter() in
handleGettingEabContactCommand(), add getOutPrintWritter() back.

Bug: 179271342
Test: atest on internal branch and aosp branch
Change-Id: I37aefabbdf52bdc96d542f05cdce5a2c91ebee10
1 file changed