688 whats app location crash

Description

Added setMapStyleOptions stub needed by WhatsApp; a member that was set to null in onDestroy() was somehow still used after exiting onDestroy - I've let the pointer still point to the object.

Related issues

e/management#688

Type of change

• Bug fix (non-breaking change which fixes an issue)

Related MRs

e/apps/GmsApi!3

How has this been tested?

Open WhatsApp on the latest dev build of herolte, share my location with someone. Observe that it doesn't crash.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules