Revert "bootstat: Refactor init/utils/boot_clock into base/chrono_utils."

This reverts commit 7c92e484503f239000ef97ef5b067907fbeaa4a6.

Mac sdk still broken (despite testing locally).

Change-Id: I7d9206e15997cd0efe081bd3fa17d53d2b20ec32
diff --git a/bootstat/Android.bp b/bootstat/Android.bp
index 95c9af5..f744ad1 100644
--- a/bootstat/Android.bp
+++ b/bootstat/Android.bp
@@ -16,6 +16,7 @@
 
 bootstat_lib_src_files = [
     "boot_event_record_store.cpp",
+    "uptime_parser.cpp",
 ]
 
 cc_defaults {