Annotate some data classes with @Keep.

These are used with RingBuffer but they are being
removed during code shrinking.

Bug: 317897994
Test: manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:cb279f32eda6554607ec9ab674fe3ae804224037)
Merged-In: I21c0298a088092cef148253be3efed65e01a90d2
Change-Id: I21c0298a088092cef148253be3efed65e01a90d2
diff --git a/services/core/java/com/android/server/net/NetworkPolicyLogger.java b/services/core/java/com/android/server/net/NetworkPolicyLogger.java
index 85731651..4d19ead 100644
--- a/services/core/java/com/android/server/net/NetworkPolicyLogger.java
+++ b/services/core/java/com/android/server/net/NetworkPolicyLogger.java
@@ -42,6 +42,7 @@
 import android.util.Log;
 import android.util.Slog;
 
+import com.android.internal.annotations.Keep;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.RingBuffer;
 import com.android.server.am.ProcessList;
@@ -693,6 +694,7 @@
      * Note: This class needs to be public for RingBuffer class to be able to create
      * new instances of this.
      */
+    @Keep
     public static final class Data {
         public int type;
         public long timeStamp;
diff --git a/services/usage/java/com/android/server/usage/BroadcastResponseStatsLogger.java b/services/usage/java/com/android/server/usage/BroadcastResponseStatsLogger.java
index bfc1771..336bfdd 100644
--- a/services/usage/java/com/android/server/usage/BroadcastResponseStatsLogger.java
+++ b/services/usage/java/com/android/server/usage/BroadcastResponseStatsLogger.java
@@ -35,6 +35,7 @@
 import android.util.TimeUtils;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.Keep;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.RingBuffer;
 import com.android.server.usage.BroadcastResponseStatsTracker.NotificationEventType;
@@ -178,6 +179,7 @@
         }
     }
 
+    @Keep
     public static final class BroadcastEvent implements Data {
         public int sourceUid;
         public int targetUserId;
@@ -198,6 +200,7 @@
         }
     }
 
+    @Keep
     public static final class NotificationEvent implements Data {
         public int type;
         public String packageName;