Add @UnsupportedAppUsage annotations

For packages:
  android.app.usage
  android.app.trust
  android.app.timezonedetector
  android.app.timezone
  android.app.timedetector
  android.app.job
  android.app.backup
  android.app.assist
  android.app.admin
  android.app

This is an automatically generated CL. See go/UnsupportedAppUsage
for more details.

Exempted-From-Owner-Approval: Mechanical changes to the codebase
which have been approved by Android API council and announced on
android-eng@

Bug: 110868826
Test: m
Change-Id: I618c5dc4462ae990d9df45c3e9ed3f092cc5138c

core/java/android/app/usage/NetworkStatsManager.java

@@ -21,6 +21,7 @@ import static com.android.internal.util.Preconditions.checkNotNull;
 import android.annotation.Nullable;
 import android.annotation.SystemService;
 import android.annotation.TestApi;
+import android.annotation.UnsupportedAppUsage;
 import android.app.usage.NetworkStats.Bucket;
 import android.content.Context;
 import android.net.ConnectivityManager;
@@ -121,6 +122,7 @@ public class NetworkStatsManager {
     /**
      * {@hide}
      */
+    @UnsupportedAppUsage
     public NetworkStatsManager(Context context) throws ServiceNotFoundException {
         this(context, INetworkStatsService.Stub.asInterface(
                 ServiceManager.getServiceOrThrow(Context.NETWORK_STATS_SERVICE)));