feat: handle invalid sessionId

[grvgoel81]

Motivation and Context

• Delete sessionId from KeyStoreManager in case of invalid/expired sessionId.

Jira Link:

Description

• Delete sessionId from KeyStoreManager in case of invalid/expired sessionId.

How has this been tested?

• Testing on emulator.

Screenshots (if appropriate):

Types of changes

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

Checklist:

• My code follows the code style of this project. (run lint)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code requires a db migration.

[metalurgical]

This looks fine. Are we sure we want to throw the error in initialize still on invalid session? Isn't it fine to leave it as empty because it will be recreated on login again like swift?

[chaitanyapotti]

lgtm