GN: Fix remoting_test_apk compile when is_chrome_branded=true

Without this, we were getting:
Exception: Wrong instrumented package. Expected
com.google.chromeremotedesktop, got org.chromium.chromoting

BUG=577483

Review URL: https://codereview.chromium.org/1573913010

Cr-Commit-Position: refs/heads/master@{#369647}
3 files changed