dumpsys: Const-ify bluetooth::shim::Dumpsys methods am: aef38d13

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3004623



Change-Id: I0622263a43358d798537a27007b609e32a7a25de
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>