Rename filename of hint icons for numbers (DO NOT MERGE)

java/res/drawable-hdpi/key_hint_num0.9.png

java/res/drawable-hdpi/key_hint_num1.9.png

java/res/drawable-hdpi/key_hint_num2.9.png

java/res/drawable-hdpi/key_hint_num3.9.png

java/res/drawable-hdpi/key_hint_num4.9.png

java/res/drawable-hdpi/key_hint_num5.9.png

java/res/drawable-hdpi/key_hint_num6.9.png

java/res/drawable-hdpi/key_hint_num7.9.png

java/res/drawable-hdpi/key_hint_num8.9.png

java/res/drawable-hdpi/key_hint_num9.9.png

java/res/drawable-mdpi/key_hint_num0.9.png

java/res/drawable-mdpi/key_hint_num1.9.png

java/res/drawable-mdpi/key_hint_num2.9.png

java/res/drawable-mdpi/key_hint_num3.9.png

java/res/drawable-mdpi/key_hint_num4.9.png

java/res/drawable-mdpi/key_hint_num5.9.png

java/res/drawable-mdpi/key_hint_num6.9.png

java/res/drawable-mdpi/key_hint_num7.9.png

java/res/drawable-mdpi/key_hint_num8.9.png

java/res/drawable-mdpi/key_hint_num9.9.png