Updated IME assets and layouts to support 600dp devices

...res/drawable-sw600dp-hdpi/sym_keyboard_numsymbol_holo.png

java/res/drawable-sw600dp-hdpi/sym_keyboard_tab_holo.png

java/res/drawable-sw600dp-land-hdpi/hint_popup_holo.9.png

java/res/drawable-sw600dp-land-mdpi/hint_popup_holo.9.png

java/res/drawable-sw600dp-land-xhdpi/hint_popup_holo.9.png

...e-sw600dp-mdpi/btn_keyboard_key_popup_selected_holo.9.png

java/res/drawable-sw600dp-mdpi/hint_popup_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num0_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num1_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num2_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num3_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num4_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num5_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num6_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num7_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num8_holo.9.png

java/res/drawable-sw600dp-mdpi/key_hint_num9_holo.9.png

...-sw600dp-mdpi/keyboard_key_feedback_background_holo.9.png

...0dp-mdpi/keyboard_key_feedback_more_background_holo.9.png

...res/drawable-sw600dp-mdpi/sym_keyboard_numsymbol_holo.png