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

[almedina-ms]

• 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 ([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

Related Issue

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