Add encrypted google services files.

.gitignore

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+.DS_Store

scripts/decrypt_gha_secret.sh

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+#!/bin/bash
+
+# Copyright 2020 Google
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# $1 is the file to decrypt
+# $2 is the output file
+# $3 is the passphrase
+
+# Decrypt the file
+# --batch to prevent interactive command --yes to assume "yes" for questions
+
+file="$1"
+output="$2"
+passphrase="$3"
+[ -z "$passphrase" ] || \
+  gpg --quiet --batch --yes --decrypt --passphrase="$passphrase" --output $output "$file"

scripts/gha-encrypted/README

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+See https://help.github.com/en/actions/configuring-and-managing-workflows/creating-and-storing-encrypted-secrets
+
+Googlers: code search firebase/cpp/Secrets to find the sources.

scripts/gha-encrypted/auth/google-services.json.gpg

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