Added trace event to screenrecord

Bug: 135278534
Test: Run Perfetto with "screen recording" enabled and execute
a query for the "first_frame" slice

MergedIn: Ifb984bfb0cdf48c61352e2923de42ce0ca06ace7
Change-Id: I20abf7300e8c46b6e6dc52096db699e95c93297d
1 file changed