Remove Arrays.checkOffsetAndCount from the greylist.

This method is being removed. All usages of this @hide method in the
platform have already been removed. For an analysis of the usage in
apps, see the bug.

This change also reorders a few methods using sort_api.sh, because a
presubmit check required it.

Bug: 78447530
Test: cts-tradefed run cts-dev -m CtsLibcoreTestCases
Change-Id: Ic89cf0775170393fe906f581364bff0e852958ef