Use SdkLevel.isAtLeastB() instead of SDK_INT

Replace the explicit SDK_INT checks with the helper function
SdkLevel.isAtLeastB().

Bug: 216524590
Test: covered by existing tests
Change-Id: I32ae771d5b157d97dfbe3c37caf62e734eaa250e

Tethering/common/TetheringLib/Android.bp

@@ -111,6 +111,7 @@ java_defaults {
         "sdk_module-lib_current_framework-wifi",
     ],
     static_libs: [
+        "modules-utils-build",
         "com.android.net.flags-aconfig-java",
     ],
     aidl: {

Tethering/common/TetheringLib/src/android/net/TetheringManager.java

@@ -42,6 +42,7 @@ import android.util.ArraySet;
 import android.util.Log;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.flags.Flags;
 
 import java.lang.annotation.Retention;
@@ -664,7 +665,7 @@ public class TetheringManager {
     }
 
     private void unsupportedAfterV() {
-        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+        if (SdkLevel.isAtLeastB()) {
             throw new UnsupportedOperationException("Not supported after SDK version "
                     + Build.VERSION_CODES.VANILLA_ICE_CREAM);
         }

Tethering/src/com/android/networkstack/tethering/Tethering.java

@@ -117,7 +117,6 @@ import android.net.wifi.p2p.WifiP2pGroup;
 import android.net.wifi.p2p.WifiP2pInfo;
 import android.net.wifi.p2p.WifiP2pManager;
 import android.os.Binder;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
@@ -146,6 +145,7 @@ import com.android.internal.util.MessageUtils;
 import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
 import com.android.modules.utils.build.SdkLevel;
+import com.android.net.flags.Flags;
 import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
 import com.android.net.module.util.CollectionUtils;
 import com.android.net.module.util.HandlerUtils;
@@ -463,7 +463,7 @@ public class Tethering {
     }
 
     boolean isTetheringWithSoftApConfigEnabled() {
-        return mDeps.isTetheringWithSoftApConfigEnabled();
+        return SdkLevel.isAtLeastB() && Flags.tetheringWithSoftApConfig();
     }
 
     /**
@@ -637,7 +637,7 @@ public class Tethering {
         // TODO: fix the teardown path to stop depending on interface state notifications.
         // These are not necessary since most/all link layers have their own teardown
         // notifications, and can race with those notifications.
-        if (enabled && Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+        if (enabled && SdkLevel.isAtLeastB()) {
             return;
         }
 
@@ -1078,7 +1078,7 @@ public class Tethering {
     }
 
     private void handleLegacyTether(String iface, final IIntResultListener listener) {
-        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+        if (SdkLevel.isAtLeastB()) {
             // After V, the TetheringManager and ConnectivityManager tether and untether methods
             // throw UnsupportedOperationException, so this cannot happen in normal use. Ensure
             // that this code cannot run even if callers use raw binder calls or other
@@ -1179,7 +1179,7 @@ public class Tethering {
     }
 
     void legacyUntether(String iface, final IIntResultListener listener) {
-        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+        if (SdkLevel.isAtLeastB()) {
             // After V, the TetheringManager and ConnectivityManager tether and untether methods
             // throw UnsupportedOperationException, so this cannot happen in normal use. Ensure
             // that this code cannot run even if callers use raw binder calls or other

Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java

@@ -214,7 +214,6 @@ public abstract class TetheringDependencies {
      * Wrapper for tethering_with_soft_ap_config feature flag.
      */
     public boolean isTetheringWithSoftApConfigEnabled() {
-        return Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM
-                && Flags.tetheringWithSoftApConfig();
+        return SdkLevel.isAtLeastB() && Flags.tetheringWithSoftApConfig();
     }
 }

tests/cts/tethering/src/android/tethering/cts/TetheringManagerTest.java

@@ -73,7 +73,6 @@ import android.net.cts.util.CtsTetheringUtils.TestTetheringEventCallback;
 import android.net.wifi.SoftApConfiguration;
 import android.net.wifi.WifiManager;
 import android.net.wifi.WifiSsid;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.PersistableBundle;
 import android.os.ResultReceiver;
@@ -391,7 +390,7 @@ public class TetheringManagerTest {
 
             mCtsTetheringUtils.stopWifiTethering(tetherEventCallback);
 
-            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.VANILLA_ICE_CREAM) {
+            if (!SdkLevel.isAtLeastB()) {
                 try {
                     final int ret = runAsShell(TETHER_PRIVILEGED,
                             () -> mTM.tether(wifiTetheringIface));
@@ -480,8 +479,7 @@ public class TetheringManagerTest {
     }
 
     private boolean isTetheringWithSoftApConfigEnabled() {
-        return Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM
-                && Flags.tetheringWithSoftApConfig();
+        return SdkLevel.isAtLeastB() && Flags.tetheringWithSoftApConfig();
     }
 
     @Test
@@ -636,7 +634,7 @@ public class TetheringManagerTest {
 
     @Test
     public void testLegacyTetherApisThrowUnsupportedOperationExceptionAfterV() {
-        assumeTrue(Build.VERSION.SDK_INT > Build.VERSION_CODES.VANILLA_ICE_CREAM);
+        assumeTrue(SdkLevel.isAtLeastB());
         assertThrows(UnsupportedOperationException.class, () -> mTM.tether("iface"));
         assertThrows(UnsupportedOperationException.class, () -> mTM.untether("iface"));
     }