fix(android): navigate after edited help request submission

[kckagancan]

Summary

Fixes the Android help request edit flow.

When an existing help request was edited and submitted, the app could stay on the request form and later restore the unfinished edit flow when navigating back through Home. This PR makes edited request submission complete visibly and clears the transient request form navigation state.

Changes

• Handles edited help request submission as an explicit update flow.
• Uses the existing local-first update behavior so the edited request is saved locally and queued for sync.
• Navigates to My Help Requests after a successful local edit update.
• Clears the request_help?draftLocalId=... edit route from navigation state after submit.
• Avoids restoring the old edit screen when the user later presses Home.
• Keeps new request creation, guest flow, offline sync behavior, and onboarding flow unchanged.

Closes #590

[mehmetcangurbuz08]

Looks good. Merging.