Merge "floss: GATT: Handle concurrent write characteristic" into main am: 535a6b8f am: 430833a1

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3261855



Change-Id: Icfd2d626189f2cf702e524d3ed86a79c5a2fbff6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>