Merge "Use `gdb-remote` without host if not given" am: a063ff34e4 am: d48428a5a9

Original change: https://android-review.googlesource.com/c/platform/development/+/2254565

Change-Id: Id92f8272adeaaeba41683019b00210754d54046b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>