Move hint session initialization to setSurface

Hint session initialization was previously during draw() which can be
problematic as it's not guaranteed to have unblocked choreographer yet.
This moves it somewhere less problematic, and reports actual work
durations in a separate renderthread callback to ensure these binders
don't block the critical path more than necessary.

Bug: 263755904
Test: manual
Change-Id: Icd7e1fcd84cd3f493bea34d1b48d14444d2f5b68