Copy ICU4J 56 RC from icu-project.org to aosp/icu56.

These files were exported from the ICU Subversion repository by running
the following command:

svn export \
  http://source.icu-project.org/repos/icu/icu4j/tags/release-56-rc/ icu4j

(Previously, only the subdirectory "main" and the files in the root
directory were exported to Android, as the other subdirectories only
contain files that are not relevant when using ICU4J in Android. Now
these are included anyway, to simplify the export process.)

Change-Id: Ifca6b213abc38f7a1c38adeb980b1e8b5226ce83
732 files changed