Use more standard Unicode notations in keyboard layout resource files.

java/res/drawable/background_voice.xml

java/res/drawable/btn_center.xml

java/res/values-ar/donottranslate-more-keys.xml

java/res/values-ar/donottranslate.xml

java/res/values-be/donottranslate-more-keys.xml

java/res/values-ca/donottranslate-more-keys.xml

java/res/values-cs/donottranslate-more-keys.xml

java/res/values-da/donottranslate-more-keys.xml

java/res/values-de/donottranslate-more-keys.xml

java/res/values-en/additional-proximitychars.xml

java/res/values-es/donottranslate-more-keys.xml

java/res/values-et/donottranslate-more-keys.xml

java/res/values-fi/donottranslate-more-keys.xml

java/res/values-fr/donottranslate-more-keys.xml

java/res/values-fr/donottranslate.xml

java/res/values-hr/donottranslate-more-keys.xml

java/res/values-hu/donottranslate-more-keys.xml

java/res/values-it/donottranslate-more-keys.xml

java/res/values-iw/donottranslate-more-keys.xml

java/res/values-iw/donottranslate.xml