Add screenshot support for preferred screenshot editor.

Use preferred editor if it's enabled (unlike the current default where
we don't check before launching the intent).

Minor refactor of ActionIntentCreator to allow it to inject dependencies
(will allow follow-on work for making the component check async).

Bug: 391401141
Flag: com.android.systemui.shared.use_preferred_image_editor
Test: Manual test of preferred image editor launch (available + unavail)
Test: atest ActionIntentCreatorTest
Change-Id: I336e2954cfe376d22be7ab153bfcdb8378aed282