track the duration between user setting a breakpoint and the breakpoint being painted

[vzaidman]

Summary

Track how long does it take to set a breakpoint between the user's click and the breakpoint being set and painted.

Test plan

See D81035860

• This change maintains backwards compatibility with previous Local Storage data (if modifying settings, experiments, or other persisted client state).

Upstreaming plan

• This commit should be sent as a patch to the upstream devtools-frontend repo following the contribution guide for Meta employees OR contribution guide.
• This commit is React Native-specific and cannot be upstreamed.