Added trace event to screenrecord

Bug: 135278534
Test: Run Perfetto with "screen recording" enabled and execute
a query for the "first_frame" slice
Exempt-From-Owner-Approval: cherry-pick

(cherry-picked from commit c840c0bf)
Merged-In: I20abf7300e8c46b6e6dc52096db699e95c93297d
Change-Id: I20abf7300e8c46b6e6dc52096db699e95c93297d