Only log when data length actually changes am: cad24262

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2578786



Change-Id: I09fe76f83e4f08499882fa7d5f10447d9ad722f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>