Save off foreground user id before passing the message to the handler on am:...

Save off foreground user id before passing the message to the handler on am: eda5120b am: e61917b8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/17749071



Change-Id: I567447cab1828d323565fc49e80f0fc450f5bfab
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>