fix: dropdown error

[jboileau99]

Description of this change

Fixes for the following:

• Error when opening DSR request form dropdowns, caused by using the application context instead of the activity context
• Memory leak related to webview dimissal

Why is this change being made?

• Chore (non-functional changes)
• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How was this tested? How can the reviewer verify your testing?

• Locally with sample application

Related issues

Checklist

• I have added tests to cover my changes.
• All new and existing tests passed.
• I have evaluated the security impact of this change, and OWASP Secure Coding Practices have been observed.
• I have informed stakeholders of my changes.