2019 Emoji Update (#1261)

* Updated EmojiCompat support:
- Fonts are now updatable
  - Old fonts will automatically be deleted
- Noto Emoji is supported
- New library version

* It will now (hopefully) only look through the emoji font directory if it exists...

* Added a noto emoji icon for Android <=6;
Font files and their version relation are only loaded once now.

* Small bugfix for the noto emoji icon

* Changed the initial size of the existingFontFiles list to a constant value

* Bugfixes
Old files are now (really) deleted
The latest version is used as the actuall font
Further optimizations

* Emoji font update triggers restart dialog

* Resized the Noto icon;
(Hopefully) fixed EmojiCompat (again)

app/src/main/res/values-de/strings.xml

@@ -294,6 +294,7 @@
     <string name="caption_systememoji">Die Standard-Emojis deines Geräts</string>
     <string name="caption_blobmoji">Die Blob–Emojis aus Android 4.4–7.1</string>
     <string name="caption_twemoji">Die Standard-Emojis von Mastodon</string>
+    <string name="caption_notoemoji">Die aktuellen Emojis von Google</string>
     <string name="download_failed">Download fehlgeschlagen.</string>
     <string name="profile_badge_bot_text">Bot</string>
     <string name="account_moved_description">%1$s ist umgezogen auf:</string>