Fix missing libunwind symbols in resolv_integration_test

This fix is similar to aosp/1769446. resolv_integration_test can't
run on Android Q devices without adding libunwind into whole_static_libs
list.

Bug: 195395865
Test: run resolv_integration_test on Android Q devices
Change-Id: I11d9151c5495788293e7378036d239f5af1e8c57