Adaptive Cards integration

[ryanisgrig]

• [x] A user should be able to interact with the clickable containers/columns on Adaptive Cards Currently only a root-level select action is enabled
• [x] Default card appearance should be transparent and use the background of the bot bubble color Right now it is always white, no matter the app:cardBackgroundColor set on item_adaptive_card.xml
• [x] Replace the hostconfig.json with empty {} to use default values
• [x] Investigate and potentially replace the HorizontalScrollView/LinearLayout implementation that allows for carousel Adaptive Cards with a RecyclerView (https://www.android-examples.com/android-horizontal-recyclerview-cardview/), not sure if this is causing an issue with the current rendering.
• [x] Adaptive Cards should be rendered in separate bubbles from their related text. This will let us scale the card view independent of related messages. See the BF Emulator for an example of how this looks

[chon219]

Opened another issue #2356 Closing this one.