[Android] Add android unit tests for all elements (#3067)

* Add base for unit tests

* Add unit tests for TextBlock, Image, Media, Container and CollectionTypeElement

* Add more tests

* Adds all actions to tests

* Add tests for base element properties

* Add tests for almost all elements

* Add missing readonly elements tests

* Add warning for test that fails

* [Android] Add unit tests for inpu elements (#3094)

* Add text input tests

* Add numberInputTests

* Add Date and Time input tests

* Add toggle visibility and choiceset input tests

* Fix togggle input tests

* Add RichTextBlock tests

* Fix another merge error

* Fix input values for toggle input

* Fix serialization