Add Nepali Traditional keyboard

java/res/values/strings.xml

java/res/xml-sw600dp/rows_nepali_traditional.xml

java/res/xml-sw768dp/rows_nepali_traditional.xml

java/res/xml-v16/key_devanagari_vowel_sign_vocalic_r.xml

java/res/xml-v16/keystyle_devanagari_sign_virama.xml

java/res/xml-v16/keystyle_devanagari_sign_visarga.xml

java/res/xml-v16/keystyle_devanagari_vowel_sign_ai.xml

java/res/xml-v16/keystyle_devanagari_vowel_sign_e.xml

java/res/xml/kbd_nepali_traditional.xml

java/res/xml/key_devanagari_vowel_sign_vocalic_r.xml

java/res/xml/key_nepali_traditional_period.xml

java/res/xml/keyboard_layout_set_nepali_traditional.xml

java/res/xml/keystyle_devanagari_sign_virama.xml

java/res/xml/keystyle_devanagari_sign_visarga.xml

java/res/xml/keystyle_devanagari_vowel_sign_ai.xml

java/res/xml/keystyle_devanagari_vowel_sign_e.xml

java/res/xml/method.xml

java/res/xml/row_qwerty4.xml

java/res/xml/rowkeys_hindi1.xml

java/res/xml/rowkeys_hindi2.xml