As a User, I would like export stock portfolio as a file on my phone

[GurkomalSRao]

Currently, the email feature allows for emailing a list of stocks and their corresponding information to a specified email address in CSV format. As a User, I want to implement functionality to export that CSV file on to the android device

[SP: 5] [Priority: 2] [Risk: Low]

Demo Scenario 1: User taps Preferences Scenario 2: User selects Export as File.

Tasks Use same functionality as "Send to email" but instead of sending to email we save as a file on the device Write tests to validate contents of file

[GurkomalSRao]

additional feature that extends functionality from #19

[GurkomalSRao]

completed