Creates TraceProcessor metric that outputs the breakdowns as a single row per EventLatency.

This will allow us to quickly extract scroll-related EventLatency breakdowns for jank analysis.

Example: https://screenshot.googleplex.com/8JxJuaShvNXFgt5

Bug:b/243365945
Change-Id: I32c22274a88be787e0806dda5b44a7f567c2292f

BUILD

diff --git a/BUILD b/BUILD
index a7e008d..052883d 100644
--- a/BUILD
+++ b/BUILD
@@ -1317,6 +1317,7 @@
         "src/trace_processor/metrics/sql/chrome/cpu_time_by_rail_mode.sql",
         "src/trace_processor/metrics/sql/chrome/estimated_power_by_category.sql",
         "src/trace_processor/metrics/sql/chrome/estimated_power_by_rail_mode.sql",
+        "src/trace_processor/metrics/sql/chrome/event_lantency_to_breakdowns.sql",
         "src/trace_processor/metrics/sql/chrome/gesture_flow_event.sql",
         "src/trace_processor/metrics/sql/chrome/gesture_flow_event_queuing_delay.sql",
         "src/trace_processor/metrics/sql/chrome/gesture_jank.sql",