This only tests stuff that's already better tested in dalvik/libcore, plus
private ICU API (RuleBasedNumberFormat) we'd like to remove, and that this
is the only caller of.
Conflicts:
tests/CoreTests/android/core/StringTest.java
git cherry-pick -e 935022a99dac5454fc478e221b6392f3ba467009
Change-Id: I0bd172f2703bbcd6381920d40244165234fef4a1