Add Crashlytics to Chat

[Jag96]

@timszot @AndrewGable will you please review this?

This PR adds Crashlytics to Chat so that we can get reports of crashes that users are experiencing as they happen. This is configured to only report crashes for release builds, dev builds will not report crashes. This PR also updates the fastlane file on iOS to upload the dsym from the build output to crashlytics automatically.

Fixed Issues

Fixes https://github.com/Expensify/Expensify/issues/142274

Tests

1. Run npm install and cd ios && pod install to confirm all the dependencies are up to date
2. Run the apps via npm run ios/npm run android (debug builds) and confirm that the apps build fine
3. Update some JS to cause a crash. I updated submitForm in ReportActionCompose.js to do abc.test(); at the beginning of the function.
4. Build the app again and cause the crash, then go to Crashlytics. Confirm that the crash isn't uploaded.
5. Go into ~/Library/Developer/Xcode/DerivedData/ReactNativeChat-bkiuyhfpclvjiabklrsfbkppdtbh/Build/Products/Release-iphonesimulator/ (replace your simluator name) and delete the Chat.app.dSYM file if it exists. This will allow us to overwrite it on the next build, so we can upload it to Firebase
6. Build a release version of the app to your device/emulator
   1. On Android, do this by running react-native run-android --variant=release
   2. On iOS, you can do this by following these instructions. If you have issues with profiles, you can also update the Scheme to run with the Release build (follow these instructions), just be sure to uncheck Debug Executable, then run the build normally to a simulator.
7. For iOS, we need to upload the dsym so that Crashlytics can register the crashes. To do this, run the following from ReactNativeChat, be sure to update your simulator name (after DerivedData)

~/Expensidev/ReactNativeChat/iOS/pods/FirebaseCrashlytics/upload-symbols -gsp ios/GoogleService-Info.plist -p ios  ~/Library/Developer/Xcode/DerivedData/ReactNativeChat-bkiuyhfpclvjiabklrsfbkppdtbh/Build/Products/Release-iphonesimulator/Chat.app.dSYM

7. Go back to the Crashlytics console and confirm that your crashes show up. Note that for iOS this seems to take a few minutes (up to 10), but on Android they were posted within 2 minutes.
8. Confirm you can run the web app and desktop app without any issues

[Jag96]

Ok, I messed around with this a bit more and I got the crash showing up on the dashboard. Going to update this PR w/ the working config and then test/confirm that is what works tomorrow.

[Jag96]

Got Android working (thanks to @timszot for helping me test) and to the point where only Release builds are producing crashes on the dashboard. Will clean this up next week and get it in review.

[timszot]

Code looks good. Going to run through the tests this afternoon.

[timszot]

Ah, forgot to mention that there are some conflicts, most likely due to mis-matched versions in the build.gradle.

[timszot]

Ran into some dev environment problems, but I got through the first few steps of the tests now. Tomorrow morning I'll test the release builds portion.

[timszot]

Android test crash (worked great): https://console.firebase.google.com/u/0/project/expensify-chat/crashlytics/app/android:com.expensify.chat/issues/f52ddfb8306449bd3b645e8fe47460aa?time=last-hour&sessionEventKey=5F89D72302BE000170749592D0C00848_1462715863849189053

iOS test crash: https://console.firebase.google.com/u/0/project/expensify-chat/crashlytics/app/ios:com.chat.expensify.chat/issues/d7c731e4d5bd09cc4810437ceabf0cff?time=last-hour

[timszot]

👍