Update API surface for ICU 66.0.1

In addition to updated APIs this CL also hides temporarily
4 ICU fields to avoid merge conflicts in downstream branches

 * android.icu.lang.UCharacter$UnicodeBlock#CHORASMIAN
 * android.icu.lang.UCharacter$UnicodeBlock#CJK_UNIFIED_IDEOGRAPHS_EXTENSION_G
 * android.icu.lang.UCharacter$UnicodeBlock#DIVES_AKURU
 * android.icu.util.VersionInfo#UNICODE_13_0

Bug: 135752089
Test: m update-api
Change-Id: I23798471a4dffe793ebf993a044830a1873fad5d