Add the AddDesktopButton to the view hierarchy behind the flags.
Flag: com.android.window.flags.enable_multiple_desktops_frontend
com.android.window.flags.enable_multiple_desktops_backend
Bug: 382057498
Test: Manual
Change-Id: I5748d8c18d8f5204fa1fb0717c4a8098bfde1537
- Add the skeleton xml file for the new desktop button
- Add the icon for this button as well
- Create the kotlin file for this button
Flag: EXEMPT as added files haven't connected with the production logic
Fix: 379941322
Test: None
Change-Id: I5c7ea2c061f0f9539483221f40c892626103d11e
minch