Remove voice-on-main related code and resources

java/res/drawable-mdpi/sym_keyboard_label_mic_holo_dark.png

java/res/values-af/strings.xml

java/res/values-am/strings.xml

java/res/values-ar/strings.xml

java/res/values-be/strings.xml

java/res/values-bg/strings.xml

java/res/values-ca/strings.xml

java/res/values-cs/strings.xml

java/res/values-da/strings.xml

java/res/values-de/strings.xml

java/res/values-el/strings.xml

java/res/values-en-rGB/strings.xml

java/res/values-en-rIN/strings.xml

java/res/values-es-rUS/strings.xml

java/res/values-es/strings.xml

java/res/values-et-rEE/strings.xml

java/res/values-fa/strings.xml

java/res/values-fi/strings.xml

java/res/values-fr-rCA/strings.xml

java/res/values-fr/strings.xml