Revert "Remove built-in emoji picker"

CHANGELOG.md

CMakeLists.txt

README.md

resources/fonts/EmojiOne/emojione-android.ttf

resources/icons/emoji-categories/activity.png

resources/icons/emoji-categories/activity@2x.png

resources/icons/emoji-categories/flags.png

resources/icons/emoji-categories/flags@2x.png

resources/icons/emoji-categories/foods.png

resources/icons/emoji-categories/foods@2x.png

resources/icons/emoji-categories/nature.png

resources/icons/emoji-categories/nature@2x.png

resources/icons/emoji-categories/objects.png

resources/icons/emoji-categories/objects@2x.png

resources/icons/emoji-categories/people.png

resources/icons/emoji-categories/people@2x.png

resources/icons/emoji-categories/symbols.png

resources/icons/emoji-categories/symbols@2x.png

resources/icons/emoji-categories/travel.png

resources/icons/emoji-categories/travel@2x.png