am 5b9a1e59: Fix key preview popup for Material theme

...able-hdpi/keyboard_key_feedback_background_lxx_dark.9.png

...ble-hdpi/keyboard_key_feedback_background_lxx_light.9.png

...hdpi/keyboard_key_feedback_more_background_lxx_dark.9.png

...dpi/keyboard_key_feedback_more_background_lxx_light.9.png

...able-mdpi/keyboard_key_feedback_background_lxx_dark.9.png

...ble-mdpi/keyboard_key_feedback_background_lxx_light.9.png

...mdpi/keyboard_key_feedback_more_background_lxx_dark.9.png

...dpi/keyboard_key_feedback_more_background_lxx_light.9.png

...ble-xhdpi/keyboard_key_feedback_background_lxx_dark.9.png

...le-xhdpi/keyboard_key_feedback_background_lxx_light.9.png

...hdpi/keyboard_key_feedback_more_background_lxx_dark.9.png

...dpi/keyboard_key_feedback_more_background_lxx_light.9.png

...le-xxhdpi/keyboard_key_feedback_background_lxx_dark.9.png

...e-xxhdpi/keyboard_key_feedback_background_lxx_light.9.png

...hdpi/keyboard_key_feedback_more_background_lxx_dark.9.png

...dpi/keyboard_key_feedback_more_background_lxx_light.9.png

...e-xxxhdpi/keyboard_key_feedback_background_lxx_dark.9.png

...-xxxhdpi/keyboard_key_feedback_background_lxx_light.9.png

...hdpi/keyboard_key_feedback_more_background_lxx_dark.9.png

...dpi/keyboard_key_feedback_more_background_lxx_light.9.png