Revert "uwb(hal): Implement UCI over serial in the default HAL"

Revert submission 2215484-pica_cf

Reason for revert: DroidMonitor: Potential culprit for Bug X - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Reverted changes: /q/submissionid:2215484-pica_cf

Change-Id: Ifd9f5cf04631e19a33b29b4b2917eaab2b506e23