tp: backport startup metric for cold/warm starts to API 23

This CL backports the startup metric for non-hot starts until API 23.
We do this by relying entirely on launching slices to guide when
the startup happened.

Change-Id: I63ec94bf0fe870ec87e886f138231664c57e9442
Bug: 190219056
diff --git a/Android.bp b/Android.bp
index b0a5498..63ee186 100644
--- a/Android.bp
+++ b/Android.bp
@@ -8103,6 +8103,8 @@
         "src/trace_processor/metrics/sql/android/span_view_stats.sql",
         "src/trace_processor/metrics/sql/android/startup/hsc.sql",
         "src/trace_processor/metrics/sql/android/startup/launches.sql",
+        "src/trace_processor/metrics/sql/android/startup/launches_maxsdk28.sql",
+        "src/trace_processor/metrics/sql/android/startup/launches_minsdk29.sql",
         "src/trace_processor/metrics/sql/android/thread_counter_span_view.sql",
         "src/trace_processor/metrics/sql/android/unsymbolized_frames.sql",
         "src/trace_processor/metrics/sql/chrome/actual_power_by_category.sql",