mediadrm: use stable C interface to record metrics

Bug: 134787536
Test: dumpsys media.metrics
Change-Id: I0156052334d0b52691cde82b71c5dc0f40d13fb5
diff --git a/drm/libmediadrm/include/mediadrm/DrmMetrics.h b/drm/libmediadrm/include/mediadrm/DrmMetrics.h
index 6f132bf..833ffa4 100644
--- a/drm/libmediadrm/include/mediadrm/DrmMetrics.h
+++ b/drm/libmediadrm/include/mediadrm/DrmMetrics.h
@@ -25,6 +25,7 @@
 #include <binder/PersistableBundle.h>
 #include <media/CounterMetric.h>
 #include <media/EventMetric.h>
+#include <sys/types.h>
 
 namespace android {
 
@@ -71,6 +72,9 @@
   void SetAppPackageName(const String8& appPackageName) { mAppPackageName = appPackageName; }
   const String8& GetAppPackageName() { return mAppPackageName; }
 
+  void SetAppUid(uid_t appUid) { mAppUid = appUid; }
+  uid_t GetAppUid() const { return mAppUid; }
+
   // Export the metrics to a PersistableBundle.
   void Export(os::PersistableBundle* metricsBundle);
 
@@ -131,6 +135,7 @@
   std::map<std::string, std::pair<int64_t, int64_t>> mSessionLifespans;
 
   String8 mAppPackageName;
+  uid_t mAppUid{~0u};
 };
 
 }  // namespace android