Add test for Integer.parseUnsignedInt(CharSequence, int, int, int)

Also:
* add a test via MethodHandles for this method too.
* update to JUnit4 to simplify amount of boilerplate for checking exceptions.
* format with google-java-format to fix mixed 2 and 4 character indent widths.

Bug: 191859202
Fix: 215435866
Test: atest libcore.java.lang.IntegerTest
Change-Id: I41d91da39556489e1649a94c07019bc13bbaad99
1 file changed