Merge "build_flag: when printing all flags, sort them." into main am: 0499f2c6

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/3126513



Change-Id: I8da6d562028cd761c3fbb54213dab56cfb45847e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>