Using Context#getSystemService instead of ServiceManager#checkService

ConnectivityService is going to be a mainline module, it can only
use formal APIs or @SystemApi. So use public API -
Context#getSystemService() instead of hidden API -
ServiceManager#checkService().

Bug: 170598012
Test: atest FrameworksNetTests
Change-Id: I9824caa7aec57e70f0ba405fcce39f9bc068732d

services/core/java/com/android/server/ConnectivityService.java

@@ -928,13 +928,6 @@ public class ConnectivityService extends IConnectivityManager.Stub
             return new MultinetworkPolicyTracker(c, h, r);
         }
 
-        /**
-         * @see ServiceManager#checkService(String)
-         */
-        public boolean hasService(@NonNull String name) {
-            return ServiceManager.checkService(name) != null;
-        }
-
         /**
          * @see IpConnectivityMetrics.Logger
          */
@@ -1078,7 +1071,8 @@ public class ConnectivityService extends IConnectivityManager.Stub
 
         // Do the same for Ethernet, since it's often not specified in the configs, although many
         // devices can use it via USB host adapters.
-        if (mNetConfigs[TYPE_ETHERNET] == null && mDeps.hasService(Context.ETHERNET_SERVICE)) {
+        if (mNetConfigs[TYPE_ETHERNET] == null
+                && mContext.getSystemService(Context.ETHERNET_SERVICE) != null) {
             mLegacyTypeTracker.addSupportedType(TYPE_ETHERNET);
             mNetworksDefined++;
         }

tests/net/java/com/android/server/ConnectivityServiceTest.java

@@ -147,6 +147,7 @@ import android.net.ConnectivityManager.PacketKeepaliveCallback;
 import android.net.ConnectivityManager.TooManyRequestsException;
 import android.net.ConnectivityThread;
 import android.net.DataStallReportParcelable;
+import android.net.EthernetManager;
 import android.net.IConnectivityDiagnosticsCallback;
 import android.net.IDnsResolver;
 import android.net.IIpConnectivityMetrics;
@@ -358,6 +359,7 @@ public class ConnectivityServiceTest {
     @Mock AppOpsManager mAppOpsManager;
     @Mock TelephonyManager mTelephonyManager;
     @Mock MockableSystemProperties mSystemProperties;
+    @Mock EthernetManager mEthernetManager;
 
     private ArgumentCaptor<ResolverParamsParcel> mResolverParamsParcelCaptor =
             ArgumentCaptor.forClass(ResolverParamsParcel.class);
@@ -445,6 +447,7 @@ public class ConnectivityServiceTest {
             if (Context.LOCATION_SERVICE.equals(name)) return mLocationManager;
             if (Context.APP_OPS_SERVICE.equals(name)) return mAppOpsManager;
             if (Context.TELEPHONY_SERVICE.equals(name)) return mTelephonyManager;
+            if (Context.ETHERNET_SERVICE.equals(name)) return mEthernetManager;
             return super.getSystemService(name);
         }
 
@@ -1274,7 +1277,6 @@ public class ConnectivityServiceTest {
         doReturn(true).when(deps).queryUserAccess(anyInt(), anyInt());
         doReturn(mIpConnectivityMetrics).when(deps).getIpConnectivityMetrics();
         doReturn(mBatteryStatsService).when(deps).getBatteryStatsService();
-        doReturn(true).when(deps).hasService(Context.ETHERNET_SERVICE);
         doAnswer(inv -> {
             mPolicyTracker = new WrappedMultinetworkPolicyTracker(
                     inv.getArgument(0), inv.getArgument(1), inv.getArgument(2));