PhoneNumberUtils API changes

Unhide the following methods:
PhoneNumberFormattingTextWatcher(String countryCode)
formatNumber(String phoneNumber, String defaultCountryIso)
formatNumber(String phoneNumber, String phoneNumberE164, String defaultCountryISO)
formatNumberToE164(String phoneNumber, String defaultCountryIso)
(The previous 3 formatting methods use an instance of PhoneNumberUtil to do the formatting)
isLocalEmergencyNumber(String number, Context context)
isVoicemailNumber(String number)
replaceUnicodeDigits(String number)
normalizeNumber(String phoneNumber)

Deprecate the following methods. These formatting-related methods don't use
PhoneNumberUtil to perform the formatting, and so are considered broken:
formatNumber(String source)
formatNumber(String source, int defaultFormattingType)
getFormatTypeForLocale(Locale locale)
formatNumber(Editable text, int defaultFormattingType)
formatNanpNumber(Editable text)
formatJapaneseNumber(Editable text)

Change-Id: Ibf854092b7db05f7e3e9401cc909c9f1ed4997b0