Default initializing error_code_ to 0.

In some environments and some c++ edge cases, an integer is not default
initialized to 0 if not assigned. In Trusty it was consistently
initializing to 01{16}. This causes problems when the isOk()
call checks to see if the error code is still 0.

Fixes: 192168662
Test: atest VtsHalRemotelyProvisionedComponentTargetTest
Change-Id: If69cfe94346e16ac4fc36293729084968a3aaf7f
1 file changed