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This patch is another effort to make Character::isCJKIdeographOrSymbol
faster.

The previous CL[1] made it faster by ~90% for codepoints below U+2020,
but codepoints abvoe U+2020 were not as fast. This CL makes all
codepoints faster, as fast as ICU functions.

      Before  After Improve ICU
All    2569 => 292    88%   298
ASCII    68 =>  68     0%   160
Han    2958 => 263    91%   344
Hira    258 =>  11    95%    14
Arabic   37 =>  32    13%    44
* # of code points and iterations vary by rows.

The previous CL[1] clarified that binary search is not as fast as ICU
functions such as uscript_getScript(). This patch changes to use
UTrie2, which is the data structure ICU property functions use.

In addition in this patch:
* U+2763 and U+2764 are added as requested by drott@.
* Character::isUprightInMixedVertical() was switched to UTrie2 too.
* Character::isCJKIdeograph() was removed because it is no longer used.

[1] https://codereview.chromium.org/1545073002

BUG=571943

Review URL: https://codereview.chromium.org/1541393003

Cr-Commit-Position: refs/heads/master@{#371917}