Refactor finalization scripts.

Bug: 264308911
Test: run locally
Change-Id: I60fa1e1121fafb617d8508403fae07f0bdf39e66

tools/finalization/environment.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -ex
+
+export FINA_BUG_ID='0'
+
+export FINA_PLATFORM_CODENAME='UpsideDownCake'
+export FINA_PLATFORM_CODENAME_JAVA='UPSIDE_DOWN_CAKE'
+export FINA_PLATFORM_SDK_VERSION='34'
+export FINA_PLATFORM_VERSION='14'
+
+export FINA_BUILD_PREFIX='UP1A'
+
+export FINA_MAINLINE_EXTENSION='6'
+export FINA_MAINLINE_SDK_COMMIT_MESSAGE=''
+export FINA_MAINLINE_SDK_BUILD_ID=0