Merge "Set optimize_for_size property for libLLVM_android" into main am: fd4a0f41f0

Original change: https://android-review.googlesource.com/c/platform/external/llvm/+/3104797

Change-Id: I8bdab4ba7911eef9b63a1ec13e0f8bd16875880e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>