Update to current version in Expo. (Resolves flickering on Android)

[DylanVann]

This will need to be regression tested against the examples since I'm not sure what most of these changes do.

This is the current code for GLView.java in Expo.

This resolves flickering on Android on waking from sleep.

The couple changes to the code are:

• Changing package to fr.greweb.rnwebgl.
• Using Log instead of Expo's logging function.
• Using ctxId instead of what it's called in Expo, since otherwise other changes would need to be made.
• Renaming of the c++ functions.

[DylanVann]

Moved to https://github.com/react-community/react-native-webgl/pull/63, had to do other things on master on my fork.