Remove more zones by improving algorithm

The zone tree algorithm that is used to generate
tzlookup.xml was not eliminating zones that have a
long period of no-DST until the specified end time.
This change improves the algorithm and thereby will
reduce the number of (unnecessarily) selectable zones
in the new time zone picker. This is a desirable
change.

The new picker removes some zones that were present
in the old picker (not all removed as part of this
change). These are:

(br) America/Recife
- Bahia used instead, and Fortaleza also has a higher
priority. Bahia as been the same as Recife since
2012-02-26T02:00:00Z and has a much larger population.
Fortaleza has been the same as Recife since
2000-10-22T02:00:00Z and has a higher city population
(but not if the area is expanded to the state).

(ru) Asia/Yakutsk
- Chita used instead. Has been the same as Yakutsk
since 2016-03-26T18:00:00Z, Chita has a larger
population.

(au) Australia/Hobart
- Sydney is available instead, and they have been the
same since 2007-10-27T16:00:00Z

This change removes the following zones from the new picker
that were previously visible only in the new picker:

(ar) America/Argentina/Mendoza
 - Same as America/Argentina/Buenos_Aires since 2009-03-15T02:00:00Z

(au) Australia/Lindeman
  - Same a Brisbane since 1994-03-05T16:00:00Z

(br) America/Belem
  - Same as America/Fortaleza since 2002-02-17T02:00:00Z

(br) America/Fortaleza
  - Same as America/Bahia since 2012-02-26T02:00:00Z

(br) America/Araguaina
  - Same as America/Bahia since 2013-02-17T02:00:00Z

(br) America/Santarem
  - Same as America/Fortaleza since 2008-06-24T04:00:00Z

(br) America/Porto_Velho
  - Same as America/Manaus since 1994-02-20T03:00:00Z

(br) America/Boa_Vista
  - Same as America/Manaus since 2000-10-15T03:00:00Z

(ca) America/Swift_Current
  - Same as America/Regina since 1972-04-30T09:00:00Z

(ca) America/Creston
  - Same as America/Dawson_Creek since 1972-08-30T09:00:00Z

(ca) America/Fort_Nelson
  - Same as America/Dawson_Creek since 2015-03-08T10:00:00Z

(id) Asia/Pontianak
  - Same as Asia/Jakarta since 1987-12-31T16:00:00Z

(kz) Asia/Qyzylorda
  - Same as Asia/Almaty since 2004-10-30T21:00:00Z

(mh) Pacific/Kwajalein
  - Same as Pacific/Majuro since 1993-08-20T12:00:00Z

(my) Asia/Kuching
  - Same as Asia/Kuala_Lumpur since 1981-12-31T16:30:00Z

(ru) Asia/Yakutsk
  - Same as Asia/Chita since 2016-03-26T18:00:00Z

(ru) Asia/Novokuznetsk
  - Same as Asia/Krasnoyarsk since 2016-03-26T20:00:00Z

(ru) Asia/Tomsk
  - Same as Asia/Barnaul since 2016-05-28T20:00:00Z

(ru) Europe/Ulyanovsk
  - Same as Europe/Saratov since 2016-12-03T23:00:00Z

Other changes exist to "notafter" times but these
should have no effect on the new picker since they are
all in the past.

Bug: 77227594
Test: Ran tzlookup_generator tests
Test: Visual inspection in the picker
Change-Id: I0d2f32ae8c7cbb8e604962096b905940d27af414