Add "geoDescription" to CallerInfo

As of change https://android-git.corp.google.com/g/111296 the
libphonenumber library now provides an API ("PhoneNumberOfflineGeocoder")
to look up a geographical description string for a given number.

This change adds a new CallerInfo field called "geoDescription", and
uses the PhoneNumberOfflineGeocoder to look it up (if the contact lookup
fails) during the CallerInfoAsyncQuery sequence.

See https://android-git.corp.google.com/g/114715 for the corresponding
change under apps/Phone, to display this string (along with the raw
number) in the incoming-call UI.

Also some other minor cleanup:
  - fixed spelling of the "normalizedNumber" field
  - tiny javadoc and code style cleanup
  - slight CallManager and CallerInfo debug output cleanup

Bug: 4595580
Change-Id: I900d8f48e953d1b24983602cb5467a5c6a6c518a