Merge "Update Material icons and key pressed state background"

.../res/drawable-mdpi/ic_emoji_nature_activated_lxx_dark.png

...res/drawable-mdpi/ic_emoji_nature_activated_lxx_light.png

java/res/drawable-mdpi/ic_emoji_nature_normal_lxx_dark.png

java/res/drawable-mdpi/ic_emoji_nature_normal_lxx_light.png

...res/drawable-mdpi/ic_emoji_objects_activated_lxx_dark.png

...es/drawable-mdpi/ic_emoji_objects_activated_lxx_light.png

java/res/drawable-mdpi/ic_emoji_objects_normal_lxx_dark.png

java/res/drawable-mdpi/ic_emoji_objects_normal_lxx_light.png

.../res/drawable-mdpi/ic_emoji_people_activated_lxx_dark.png

...res/drawable-mdpi/ic_emoji_people_activated_lxx_light.png

java/res/drawable-mdpi/ic_emoji_people_normal_lxx_dark.png

java/res/drawable-mdpi/ic_emoji_people_normal_lxx_light.png

.../res/drawable-mdpi/ic_emoji_places_activated_lxx_dark.png

...res/drawable-mdpi/ic_emoji_places_activated_lxx_light.png

java/res/drawable-mdpi/ic_emoji_places_normal_lxx_dark.png

java/res/drawable-mdpi/ic_emoji_places_normal_lxx_light.png

...res/drawable-mdpi/ic_emoji_recents_activated_lxx_dark.png

...es/drawable-mdpi/ic_emoji_recents_activated_lxx_light.png

java/res/drawable-mdpi/ic_emoji_recents_normal_lxx_dark.png

java/res/drawable-mdpi/ic_emoji_recents_normal_lxx_light.png