API updated for ICU4J 63.1

- Expose API that are set to @stable in ICU 63
- All methods have test coverage by CTS, according to the coverage
report http://go/libcore-coverage-qt

The new APIs are introduced with the following purpose:
1. New constant in UCharacter to obtain Unicode property of a unicode
   character.
   3 new classes: VerticalOrientation, IndicPositionalCategory, IndicSyllabicCategory
2. Some toString and hashCode are "undeprecated". They are methods in
   Object, and shouldn't be "deprecated".
3. Obtain DecimalFormatSymbols in a particular numbering system
4. ICU currency becomes more friendly with java.util.Currency. Add
   methods to convert between 2 types
5. BreakIterator supports input text in CharSequence
6. More powerful API in Edits and CaseMap

Bug: 109837373
Bug: 113100098
Test: CtsIcuTestCases
Change-Id: I8201f2ef6013b0326a4f37a01dec97dfa39f1c30