Pass enable-sym-link to resolvePartialDownload feature when option set.

New test_module_config tests fail without this.  This fixes it.
The @Option is already used to control the feature in a couple places.

Test: presubmit with a new Test_Module_config and this in one chain.
Test: m google-tradefed-all tradefed-all && ./run_tradefed_tests.sh

Sandbox host out log:
```
06-21 13:06:55 D/TradefedFeatureClient: invoking feature 'resolvePartialDownload'
06-21 13:06:55 D/TradefedFeatureClient: name: "resolvePartialDownload"
args {
  key: "destination_dir"
  value: "/tmp/tf-workfolder4805643045697225139/device-tests_configs.zip1992263290465672427"
}
args {
  key: "enable-resolve-sym-links"
  value: "true"
}
args {
  key: "exclude_filters"
  value: "[.]config$;[.]jar$"
}
args {
  key: "include_filters"
  value: "/NewMyHelloWorldTests_TEST/"
}
args {
  key: "remote_paths"
  value: "ab:/git_main/aosp_cf_x86_64_only_phone-trunk_staging-userdebug/P76564855/device-tests.zip;ab:/git_main/test_suites_x86_64-trunk_staging/P76564890/general-tests.zip"
}
reference_id: "0bd51046-6855-4866-8a86-255e5c2be88b"
```

from this build: https://android-build.corp.google.com/test_investigate/invocation/I15100010289787785/test/TR85929350819188677/?status=none


Change-Id: Ia3e4cae3ed41a6620466e280663d374cf3bf382c

• src/com/android/tradefed/testtype/suite/ITestSuite.java[diff]

1. Create your change in Gerrit
2. Add the reviewer named "Tradefed Codereview" (email: tradefed-codereview@tradefederation.google.com.iam.gserviceaccount.com)
3. Review the code review guidance at go/tf-guidelines and go/tradefed-code-reviews
4. GWSQ should add a couple of people from the team to review your code and give feedback.