Implement a new scroll jank metric in Perfetto.

This new metric is based on `event_latency_scroll_jank_cause.sql`,
and is expected to provide a better quality picture of janky
scrolling in Chrome.

Bug: b/273338973
Test: Tested with locally built Perfetto UI.
Change-Id: I06457f3fb117e6ff9ea6ad0a75e1239ef6527dde

BUILD

diff --git a/BUILD b/BUILD
index 8cc1999..e76e3d1 100644
--- a/BUILD
+++ b/BUILD
@@ -1637,6 +1637,7 @@
         "src/trace_processor/metrics/sql/chrome/chrome_reliable_range.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_scroll_inputs_per_frame.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_scroll_jank_caused_by_scheduling.sql",
+        "src/trace_processor/metrics/sql/chrome/chrome_scroll_jank_v2.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_slice_names.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_stack_samples_for_task.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_tasks.sql",
@@ -3623,6 +3624,7 @@
         "protos/perfetto/metrics/chrome/performance_mark_hashes.proto",
         "protos/perfetto/metrics/chrome/reported_by_page.proto",
         "protos/perfetto/metrics/chrome/scroll_jank.proto",
+        "protos/perfetto/metrics/chrome/scroll_jank_v2.proto",
         "protos/perfetto/metrics/chrome/slice_names.proto",
         "protos/perfetto/metrics/chrome/test_chrome_metric.proto",
         "protos/perfetto/metrics/chrome/touch_jank.proto",