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: I4980b014251db3e48abcaab916a9adf8fd60e0da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>