Fix Initialization Check
Fix Initialization Check

• In Expo projects, the native bridge would be undefined.
• Most OneSignal functions have checks to make sure they don't attempt to execute functions if running in an Expo project to avoid undefined errors
• However our init() function was not checking first. This commit fixes the issue by adding a check and early return.

geektimecoil/react-native-onesignal,geektimecoil/react-native-onesignal,geektimecoil/react-native-onesignal