[automerger skipped] Improve test coverage for Arrays and Streams. am: e4bc3ffb11 am: 134549c512 am: daa5d4081f -s ours

am skip reason: Change-Id If9ed6fe160b7a55f0758392da9929d78ee25a293 with SHA-1 e4bc3ffb11 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/libcore/+/10967013

Change-Id: I98e372a723d0011f0eac17794c0197dbbb66f9f6