In mobile scan mode, bot activity is read twice before focus moves to an attachment

Issue description update: (by @corinagum)

When starting with focus at the top of the activity, mobile behavior is wonky where the activity repeats twice before the user can focus INSIDE of the Adaptive Card. Repro steps:

1. Send 'card calendar', and focus on this activity from the user (I used tap as opposed to swipe)
2. Swipe right multiple times:
   1. Speak timestamp of user's activity
   2. "Bot said, landmark:"
   3. "Showing calendar" (activity)
   4. "1 attachment"
   5. Speak timestamp of bot activity
   6. "Press enter to interact" <-- needs to be removed on mobile (#3758)
   7. "Bot said"
   8. "Showing calendar"
   9. "Bot attached"
   10. "Adaptive Card design session"

As seen in steps 2-4, then 7-9, double aria labels are being read twice when they shouldn't be.

Original text:

How to shift between adaptive cards on an Android phone using accessibility gestures. As per the latest 4.12.0 release, we can use up and down arrow key using keyboard but the same thing can't be achieved on using the bot in Android phone using gestures. Is there any alternative/solution for this ?