Update action key and shift key backgrounds of LXX

.../res/drawable-hdpi/btn_keyboard_key_active_lxx_dark.9.png

...wable-hdpi/btn_keyboard_key_active_pressed_lxx_dark.9.png

.../drawable-hdpi/btn_keyboard_key_normal_off_lxx_dark.9.png

...s/drawable-hdpi/btn_keyboard_key_normal_on_lxx_dark.9.png

...drawable-hdpi/btn_keyboard_key_pressed_off_lxx_dark.9.png

.../drawable-hdpi/btn_keyboard_key_pressed_on_lxx_dark.9.png

.../res/drawable-mdpi/btn_keyboard_key_active_lxx_dark.9.png

...wable-mdpi/btn_keyboard_key_active_pressed_lxx_dark.9.png

.../drawable-mdpi/btn_keyboard_key_normal_off_lxx_dark.9.png

...s/drawable-mdpi/btn_keyboard_key_normal_on_lxx_dark.9.png

...drawable-mdpi/btn_keyboard_key_pressed_off_lxx_dark.9.png

.../drawable-mdpi/btn_keyboard_key_pressed_on_lxx_dark.9.png

...res/drawable-xhdpi/btn_keyboard_key_active_lxx_dark.9.png

...able-xhdpi/btn_keyboard_key_active_pressed_lxx_dark.9.png

...drawable-xhdpi/btn_keyboard_key_normal_off_lxx_dark.9.png

.../drawable-xhdpi/btn_keyboard_key_normal_on_lxx_dark.9.png

...rawable-xhdpi/btn_keyboard_key_pressed_off_lxx_dark.9.png

...drawable-xhdpi/btn_keyboard_key_pressed_on_lxx_dark.9.png

...es/drawable-xxhdpi/btn_keyboard_key_active_lxx_dark.9.png

...ble-xxhdpi/btn_keyboard_key_active_pressed_lxx_dark.9.png