Add java.util.concurrent classes into EXPECTED_UPSTREAM

The libcore-compare-upstreams tool is used to guess the version of each
file by comparing the diff.

Bug: 111603149
Test: ojluni_refresh_files
Change-Id: Ia01075b80c85b21ef940ab4eb22036345d57b75e
1 file changed
tree: 77e4ab7889a22540de8586596d173e8a83944a84
  1. ojluni/
  2. tools/
  3. EXPECTED_UPSTREAM