Render sliding spacebar language switch arrows by text

...wable-hdpi/sym_keyboard_feedback_language_arrows_left.png

...able-hdpi/sym_keyboard_feedback_language_arrows_right.png

java/res/drawable-hdpi/sym_keyboard_language_arrows_left.png

.../res/drawable-hdpi/sym_keyboard_language_arrows_right.png

...wable-mdpi/sym_keyboard_feedback_language_arrows_left.png

...able-mdpi/sym_keyboard_feedback_language_arrows_right.png

java/res/drawable-mdpi/sym_keyboard_language_arrows_left.png

.../res/drawable-mdpi/sym_keyboard_language_arrows_right.png

...able-xhdpi/sym_keyboard_feedback_language_arrows_left.png

...ble-xhdpi/sym_keyboard_feedback_language_arrows_right.png

.../res/drawable-xhdpi/sym_keyboard_language_arrows_left.png

...res/drawable-xhdpi/sym_keyboard_language_arrows_right.png

java/res/values/attrs.xml

java/res/values/keyboard-icons-black.xml

java/res/values/keyboard-icons-ics.xml

java/res/values/keyboard-icons-white.xml

java/src/com/android/inputmethod/keyboard/LatinKeyboard.java

.../inputmethod/keyboard/internal/SlidingLocaleDrawable.java