Split ChooserContentPreviewUi into multiple components

A prep step for the new preview UI: extract each preview logic from
ChooserContentPreviewUi into individual components leaving the former as
a facade for the latter.
More specifically:
 * move ChooserContnetPreviewUi into a new package;
 * make #displayTextContentPreview() to be the core of the
   TextContentPreviewUI (with related methods);
 * make #displayFileContentPreview() to be the core of the
   FileContentPreviewUi (with related methods);
 * make #displayImageContentPreview() to the core of the
   ImageContentPreviewUi (with the related methods);
 * for all aforementioned new components, pass component specific
   dependencies as constructor arguments, capture the common component
   contract in the base abstract class, ContentPreviewUi, along with the
   static utility methods.

Bug: 271613784
Test: Manual testing of
 * Text sharing with and without preview;
 * File sharing with and without preivew, single file and multiple
   fiels;
 * Image sharing, single and multiple files, image + text sharing;
 * Custom actions with text, image and files sharing;
 * Reselection action with text, image and files sharing.
Test: screenshot transition animation
Test: atest IntentResolverUnitTests
Change-Id: I392de610b3d3e044e23c83d29fd11061fbc7192d

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