Merge "Floss: Add gatt client commands in btclient" am: 81e7fc4e am: 28916a35 am: 86b70038

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2184582



Change-Id: I6cf76f422eb12bf7f1e0321d4eff479dac85a0cc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>