[metrics] adding chrome_stack_samples_for_task.sql

Given a chrome task name resulting from chrome_tasks.sql, this script
finds and aggregates all stack samples that happened during this task
and returns them.

Bug:235062961
Change-Id: Ibe55e3941c5113ca5c1b58ba68d9aa6a84f6613d
diff --git a/Android.bp b/Android.bp
index 8bc5ce4..15f2d5c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -8916,6 +8916,7 @@
         "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",
+        "src/trace_processor/metrics/sql/chrome/chrome_stack_samples_for_task.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_tasks.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_thread_slice.sql",
         "src/trace_processor/metrics/sql/chrome/chrome_unsymbolized_args.sql",