Android App Crashes while sending message to users/ on channel

## Description I found a security vulnerability in Rocket's latest android app by which I was able to remotely crash any user’s app instantly just by just sending a simple message in private or in channel. The vulnerability require the victim open the message. ## Devices and Versions Rocket.Chat.Android version: (e.g. 4.5.1) Mobile device model and OS version: (tested on :+1: -- " **Android 6.0, 8.0, 10.0**"), probably any other android version ## Steps to reproduce > Create new #test channel > Send POC Code onto the channel > Open Mobile App > App gets crashed ## POC ### Crafted code to crash mobile app https://i.postimg.cc/zvBWdMzT/Screenshot-20200320-112405.png ### Message Preview https://i.postimg.cc/fbCJ6KgC/Screenshot-20200320-112541.png ### App Gets Crashed https://i.postimg.cc/26J8DXdQ/Screenshot-20200320-112711.png ### Code Link https://pastebin.com/raw/JEDcC5Yr **There is no such problem in iOS client and rocket web** ## Impact An attacker could crash the internal chat user's phone, everytime he/she opens the rocket chat , i.e posting crafted code on #general channel Hi, i even posted the issue on github, before i got to know about rocket chat on H1, but issue still not fixed, so just tryna keep you updated guys. https://github.com/RocketChat/Rocket.Chat.ReactNative/issues/1907