Add Hinglish (hi_ZZ) subtype

java/res/values/donottranslate.xml

java/res/values/strings.xml

java/res/xml/key_styles_currency.xml

java/res/xml/method.xml

...oid/inputmethod/keyboard/internal/KeyboardTextsTable.java

...m/android/inputmethod/latin/utils/SubtypeLocaleUtils.java

...tmethod/keyboard/KeyboardLayoutSetSubtypesCountTests.java

...roid/inputmethod/keyboard/layout/tests/TestsHinglish.java

...d/inputmethod/latin/utils/SpacebarLanguageUtilsTests.java

...roid/inputmethod/latin/utils/SubtypeLocaleUtilsTests.java

...board-text/res/values-hi-rZZ/donottranslate-more-keys.xml