fix(android): soft exception when library try to access RCTDeviceEventEmitter before it is initialised

[war-in]

This PR continues the improvement introduced here: #107

Currently, the app isn't crashing, but it's throwing soft exceptions when trying to emit events before RCTDeviceEventEmitter is initialised

Unhandled SoftException
com.facebook.react.bridge.ReactNoCrashSoftException: raiseSoftException(callWithExistingReactInstance(callFunctionOnModule("RCTDeviceEventEmitter", "emit"))): Execute: reactInstance is null. Dropping work.

To fix this, I wrapped the second emit with

if (getReactApplicationContext().hasActiveReactInstance()) {
    ...
}

and changed the previous hasActiveCatalystInstance() to hasActiveReactInstance() as it has been deprecated