Optimize nav drawer and emote pop-over

[david-cako]

Navigation drawer and emote pop-over uses arcane calculations and alignments to get it to work. Android made it difficult to position the emote drawer behind the chat and toggle it above the chat without also having the invisible area it occupies covering part of the chat (and interfering with scroll interactions). Perhaps there are better ways to do this with rn-interactable, or perhaps all of this should be lifted out into a native module.

[david-cako]

Possible substitute for react native interactable: https://github.com/rgommezz/react-native-scroll-bottom-sheet