add `SafeAreaView` to `MessageReactionsModal`. The `SafeAreaView` pushes the container of `MessageReactionsModal` up a bit to a place where things like the Android nav buttons won't overlap with the content of the modal
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Linear Task: [[ https://linear.app/comm/issue/ENG-2846/messagereactionsmodal-intersects-with-bottom-of-screen-on-android | ENG-2846 ]]