Atom: BootSequenceReported

Logs information about boot time and reason to statsd.
Specifically: bootloader boot reason, system boot reason, bootloader
boot time, total boot time, time that the boot finished, and time since
last boot.

Test: booted the phone and verified "adb logcat -b stats" received the
event

Change-Id: I769df9a09263ed3667f7085c81b3d072e868cbda
diff --git a/bootstat/Android.bp b/bootstat/Android.bp
index 2c87018..e530774 100644
--- a/bootstat/Android.bp
+++ b/bootstat/Android.bp
@@ -63,7 +63,10 @@
     name: "bootstat",
     defaults: ["bootstat_defaults"],
     static_libs: ["libbootstat"],
-    shared_libs: ["liblogcat"],
+    shared_libs: [
+        "liblogcat",
+        "libstatslog"
+    ],
     init_rc: ["bootstat.rc"],
     product_variables: {
         debuggable: {