[metrics] Add input_arrived_to_processing_intervals.sql.

Calculating time intervals where at the beginning of the interval
we received input, and at the end of the interval we started
processing the input, giving us the time window within which we
could have started processing but were blocked or delayed.

Change-Id: I086f69672e4a9f8eb29a5bb0e1732913b7394692

BUILD

diff --git a/BUILD b/BUILD
index 7d2bfaf..5be8e5b 100644
--- a/BUILD
+++ b/BUILD
@@ -1200,6 +1200,7 @@
         "src/trace_processor/metrics/sql/chrome/actual_power_by_rail_mode.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_event_metadata.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_histogram_hashes.sql",
+        "src/trace_processor/metrics/sql/chrome/chrome_input_to_browser_intervals.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_performance_mark_hashes.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_processes.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_slice_names.sql",