feat: Support 'adaptiveCard/action' in Teams handler

[cfe84]

Fixes #3715

Description

When using Universal Action Model, Adaptive Cards are sending an activity with name adaptiveCard/action. This commit adds a handler for that type to the teamsActivityHandler in order to support UAM.

Specific Changes

• Add handler handleAdaptiveCardAction to teamsActivityHandler
• Add logic in onInvokeActivity to call this handler when invoke name is adaptiveCard/action
• Add an AdaptiveCardActionResponse type to the botbuilder-core interfaces

Testing

• Added corresponding unit-tests
• Tested with an app

[ghost]

All CLA requirements met.

[coveralls]

Pull Request Test Coverage Report for Build 900612851

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 85.341%

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Totals
Change from base Build 900609174:	0.1%
Covered Lines:	19237
Relevant Lines:	21437

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💛 - Coveralls