Catch all Java errors to avoid Android native app crashes

[steven-sh]

It looks like there was a previous attempt at a catch-all for exceptions, however the try/catch blocks were outside the threads being created so the only call being caught was the call to start the thread. If an exception happened inside the thread while it was running, it would be uncaught and cause an app crash.

To fix the error catching I did the following:

• Added try/catch blocks to any react method that didn't already have one
• Added try/catch blocks to the code inside the thread runnables. If an error is caught it is logged to the console and the promise is rejected.
• Changed the existing catch blocks to catch Throwable rather than Exception. Since both Error and Exception extend throwable (and all Errors are unchecked) this allows us to catch anything that could cause a native crash.

It might be worth removing the original try/catch blocks (outside the threads) to simplify the code since they aren't really catching much - what do you think?

[MoOx]

Looks good to me. I am ok to remove try/catch that don't make sense.
@wmcmahan what do you think?

[wmcmahan]

I agree. These changes look good, maybe worth a separate PR for cleaning up old try blocka, since these changes are nice and succinct. Thanks again for the help!