Introducing Upload Strategies

[anchita-g]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

One of the PRs to fix #760

Description

• Created a new class PatchGeneratorMode to define the different modes for PatchGeneration
• Created a new class UploadStrategy to enlist all the possible options to support Upload

Alternative(s) considered
Have you considered any alternatives? And if so, why have you chosen the approach in this PR?

Type
Choose one: Feature

Screenshots (if applicable)

Checklist

• I have read and acknowledged the Code of conduct.
• I have read the Contributing page.
• I have signed the Google Individual CLA, or I am covered by my company's Corporate CLA.
• I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
• I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the style guide of this project.
• I have run ./gradlew check and ./gradlew connectedCheck to test my changes locally.
• I have built and run the demo app(s) to verify my change fixes the issue and/or does not break the demo app(s).

[omarismail94]

Nice change Anchita!

[omarismail94]

Great change @anchita-g !