PAST: Port implementation to GD

* Add PAST commands to PDL and PeriodicSyncManager
* Add unit test to verify the implementation

Bug: 229965085
Tag: #gd-refactor
Test: gd/cet/run --sl4a_sl4a
Test: bluetooth_test_gd_unit
Ignore-AOSP-First: testing
Change-Id: Id7217b7b9d33549b488b6a0ef2dc9284dba24947