Translate android text for zh_CN

Now that this file is fully translated (with minor issues).

potential issues:
1) not sure whether tr_zh.json should be identical to this one or not.
2) some format (like new line char) might look strange in translation.
3) some translation lacks context (e.g. "with you! Just click......", not sure what's the previous text for 'with you' so I've skipped it for now).