Merge "[SparseSetArray] optimize copy constructor" into tm-dev am: 79286a97 am: d014ec92

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18415062



Change-Id: I7917863798414bdb0a1c9f6209751f8d1b1925b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>