[NEW] Adaptive Icons (#1904)

android/app/src/debug/res/mipmap-hdpi/ic_launcher.png

android/app/src/debug/res/mipmap-mdpi/ic_launcher.png

android/app/src/debug/res/mipmap-xhdpi/ic_launcher.png

android/app/src/debug/res/mipmap-xxhdpi/ic_launcher.png

android/app/src/debug/res/mipmap-xxxhdpi/ic_launcher.png

android/app/src/debug/res/values/colors.xml

android/app/src/debug/res/values/strings.xml

android/app/src/debug/res/values/styles.xml

android/app/src/main/ic_launcher-web.png

.../app/src/main/res/drawable-v24/ic_launcher_background.xml

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

.../app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

android/app/src/main/res/mipmap-hdpi/ic_launcher.png

...d/app/src/main/res/mipmap-hdpi/ic_launcher_foreground.png

android/app/src/main/res/mipmap-hdpi/ic_launcher_round.png

android/app/src/main/res/mipmap-mdpi/ic_launcher.png

...d/app/src/main/res/mipmap-mdpi/ic_launcher_foreground.png

android/app/src/main/res/mipmap-mdpi/ic_launcher_round.png

android/app/src/main/res/mipmap-xhdpi/ic_launcher.png

.../app/src/main/res/mipmap-xhdpi/ic_launcher_foreground.png