Fix switching clock in picker not take effects on lockscreen

It's caused by distinctUntilChanged in currentClockId.
Same clock id will be sent by onCurrentClockChanged triggered in onPluginLoaded
which will not trigger currentClock to create new clock.

Test: manual
Flag: ACONFIG com.android.systemui.migrate_clocks_to_blueprint STAGING
Bug: 326925900

Change-Id: Id3e29cd947f6aa21e5f6fa34d0f1cadf35f8c1dc