Implement a Chrome histogram summary metric in Perfetto.

This new metric provides statistical summaries of the histograms in
Chrome browser.

Bug: None
Test: Tested with Trace Processor.
Change-Id: I1b792c2807d9a61d5e3544aab2b5aa7f806a9aed
diff --git a/Android.bp b/Android.bp
index a7de450..8bf762b 100644
--- a/Android.bp
+++ b/Android.bp
@@ -5468,6 +5468,7 @@
         "protos/perfetto/metrics/chrome/dropped_frames.proto",
         "protos/perfetto/metrics/chrome/frame_times.proto",
         "protos/perfetto/metrics/chrome/histogram_hashes.proto",
+        "protos/perfetto/metrics/chrome/histogram_summaries.proto",
         "protos/perfetto/metrics/chrome/long_latency.proto",
         "protos/perfetto/metrics/chrome/media_metric.proto",
         "protos/perfetto/metrics/chrome/performance_mark_hashes.proto",
@@ -13198,6 +13199,7 @@
         "src/trace_processor/metrics/sql/chrome/chrome_args_class_names.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_histogram_summaries.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_input_to_browser_intervals.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_input_to_browser_intervals_base.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_input_to_browser_intervals_template.sql",