Android: Only specify the transition name for the target Activity.

The source Views don't need the transition name. We could get the name
from the sharedView via getTransitionName, but since the TV
ImageCardView isn't inflated in XML it would be to be manually set.

I'm not sure if that would be any cleaner than this.

Source/Android/app/src/main/res/layout/card_game.xml

@@ -18,7 +18,6 @@
             android:id="@+id/image_game_screen"
             android:layout_width="match_parent"
             android:layout_height="0dp"
-            android:transitionName="image_game_screenshot"
             android:layout_weight="1"
             tools:src="@drawable/placeholder_screenshot"
             tools:scaleType="centerCrop"/>