ci: android: Play store publishing setup

.ci/scripts/android/mainlinebuild.sh

@@ -0,0 +1,21 @@
+#!/bin/bash -ex
+
+# SPDX-FileCopyrightText: 2024 yuzu Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+export NDK_CCACHE="$(which ccache)"
+ccache -s
+
+export ANDROID_KEYSTORE_FILE="${GITHUB_WORKSPACE}/ks.jks"
+base64 --decode <<< "${MAINLINE_PLAY_ANDROID_KEYSTORE_B64}" > "${ANDROID_KEYSTORE_FILE}"
+export ANDROID_KEY_ALIAS="${PLAY_ANDROID_KEY_ALIAS}"
+export ANDROID_KEYSTORE_PASS="${PLAY_ANDROID_KEYSTORE_PASS}"
+export SERVICE_ACCOUNT_KEY_PATH="${GITHUB_WORKSPACE}/sa.json"
+base64 --decode <<< "${MAINLINE_SERVICE_ACCOUNT_KEY_B64}" > "${SERVICE_ACCOUNT_KEY_PATH}"
+./gradlew "publishMainlineReleaseBundle"
+
+ccache -s
+
+if [ ! -z "${ANDROID_KEYSTORE_B64}" ]; then
+    rm "${ANDROID_KEYSTORE_FILE}"
+fi