Changed content description for add contact and group buttons

    <!-- Menu item that deletes the currently selected group [CHAR LIMIT=30] -->

    <string name="menu_deleteGroup">Delete</string>

    <!-- Menu item (in the action bar) that creates a new contacts [CHAR LIMIT=12] -->

    <string name="menu_new_contact_action_bar">New</string>

    <!-- Menu item (in the action bar) that creates a new contact [CHAR LIMIT=30] -->

    <string name="menu_new_contact_action_bar">Add Contact</string>

    <!-- Menu item (in the action bar) that creates a new group [CHAR LIMIT=12] -->

    <string name="menu_new_group_action_bar">New</string>

    <!-- Menu item (in the action bar) that creates a new group [CHAR LIMIT=30] -->

    <string name="menu_new_group_action_bar">Add Group</string>

    <!-- Title of the confirmation dialog for separating contacts into multiple instances [CHAR LIMIT=26] -->

    <string name="splitConfirmation_title">Separate contact?</string>