Fix clock can be gone in wallpaper picker multi crop preview by creating a new...

Fix clock can be gone in wallpaper picker multi crop preview by creating a new clock instance for each previewRenderer

Flag: ACONFIG com.android.systemui.migrate_clocks_to_blueprint STAGING
ACONFIG com.android.wallpaper.multi_crop_preview_ui_flag TEAMFOOD
Bug: 327668072
Test: manual

Change-Id: I216cf50d012cbaa787f6a5ba3943d5f2fc453795