Enum-ify stack::gatt_status_text am: 764474fb am: d471b49c am: 24011246 am: 260592f2

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2484907



Change-Id: I2688c17cd1a41bc7e3b5c88e0d0b054c8034086b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>