Podcast player dismiss transition

[tomastiminskas]

Implement custom transition on Podcast Player view dismissal/presentation similar to youtube transition. Video reference added below

153472439-7d2eebbc-56c4-4a3b-b2f8-fa8f760cac57.mov

Right now the Podcast Player is presented on the detail fragment container and it can be dismissed swiping down on the top edge of the view or using the down arrow button. On both cases the player is dismissed sliding down and the player bar is there already on the bottom bar section.

Screen_Recording_20220311-150238_Sphinx.Debug.mp4

Modules involved:

- podcast-player
- dashboard

[KingParmenides]

Submitted PR for this Sphinx bounty: #738

This targets Sphinx bounty IDs #16 / #174 for issue #422 by adding a podcast-specific MotionLayout transition so the podcast player presents/dismisses into the dashboard mini-player area instead of simply sliding out.

Verification listed in the PR body:

• xmllint --noout sphinx/activity/main/activitymain/src/main/res/xml/motion_scene_main.xml sphinx/activity/main/activitymain/src/main/res/layout/activity_main.xml
• ./gradlew :sphinx:activity:main:activitymain:assembleDebug

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