Upgrade external/junit to 4.13.2 Cherry-picking to mainline-prod for consistency with other branches. Contains just the changes from 4.12 to 4.13.2 and undoes local Android changes. Will re-patch those in in subsequent CLs. Bug: 129054170 Test: m Change-Id: I6135799c8be5db2ec4c3f13951c18c072427e30d Merged-In: I6135799c8be5db2ec4c3f13951c18c072427e30d (cherry picked from commit 8e80a2a7b89329f95cb41e8b2981044362478c04)