Fork clipboard overlay's IntentCreator behind a flag.

Convert to a kotlin object.

Change to align with impl in screenshots in preparation for editor
intent changes.

Bug: 391401141
Flag: com.android.systemui.shared.use_preferred_image_editor
Test: atest ClipboardOverlayControllerTest
Test: atest com.android.systemui.clipboardoverlay.ActionIntentCreatorTest
Change-Id: I582220615ed630b39d4152776622980b930540d7