Add the functionality for logging counters.

Also correct clang-format for libmetricslogger

Test: Run libmetriclogger_test
Change-Id: If61f0bdc394a43e249ec4691da70175eeaf4cec6
diff --git a/libmetricslogger/Android.bp b/libmetricslogger/Android.bp
index da8afe1..26a041a 100644
--- a/libmetricslogger/Android.bp
+++ b/libmetricslogger/Android.bp
@@ -23,6 +23,7 @@
         // 524291 corresponds to sysui_histogram, from
         // frameworks/base/core/java/com/android/internal/logging/EventLogTags.logtags
         "-DHISTOGRAM_LOG_TAG=524292",
+        "-DCOUNT_LOG_TAG=524290",
     ],
 }