ci(gradle): add sigining key

Author: kevinkowa

.gitignore

@@ -35,3 +35,4 @@ package-lock.json
 *.test-metadata.txt
 *.py
 fix-copyrights.sh
+/.utility/secring.gpg

.utility/deploy-travis-wrapper.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
 set -o pipefail
 
-./gradlew uploadArchives &
+openssl aes-256-cbc -K $encrypted_99a33d910092_key -iv $encrypted_99a33d910092_iv -in .utility/secring.gpg.enc -out .utility/secring.gpg -d
+./gradlew uploadArchives -Psigning.keyId=$SIGNING_KEY -Psigning.password=$SIGNING_PASSWORD -Psigning.secretKeyRingFile=./scripts/secring.gpg &
 
 # output every 9 min to prevent a Travis timeout
 PID=$!