pdl: apply zero-padding correctly on the MSB side of the payload am:...

pdl: apply zero-padding correctly on the MSB side of the payload am: 6c1556ee am: d1fbfe0c am: 66fe3583 am: 3eafa5f5

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2153555



Change-Id: I018bc2c2e08481e05e8bf750f8a10a48933ef06a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>