#!/bin/bash
f='<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://s...content-available-to-author-only...d.com/apk/res/android"
    xmlns:tools="http://s...content-available-to-author-only...d.com/tools"
    coreApp="true"
    package="com.btaudio"
    android:versionName="0.7-191027"
    android:sharedUserId="android.uid.system">';
test=$(date '+%y%m%d');
sed 's|-[^"]*"$|-'"$test"'"|g' <<< "$f";