Opt-out for always-on VPN: rename API.

Rename the opt-out flag in AndroidManifest to
SERVICE_META_DATA_SUPPORTS_ALWAYS_ON
as directed by the API Council.

Bug: 64331776
Bug: 62503664
Test: run cts-dev --module CtsDevicePolicyManagerTestCases -t com.android.cts.devicepolicy.MixedManagedProfileOwnerTest#testAlwaysOnVpn*

Change-Id: I42db531405629ebcd123bed9feb8cbb099985c1d
diff --git a/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/src/com/android/cts/deviceandprofileowner/AlwaysOnVpnUnsupportedTest.java b/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/src/com/android/cts/deviceandprofileowner/AlwaysOnVpnUnsupportedTest.java
index 03f8be2..488823a 100644
--- a/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/src/com/android/cts/deviceandprofileowner/AlwaysOnVpnUnsupportedTest.java
+++ b/hostsidetests/devicepolicy/app/DeviceAndProfileOwner/src/com/android/cts/deviceandprofileowner/AlwaysOnVpnUnsupportedTest.java
@@ -26,7 +26,7 @@
  * <ul>
  *     <li>has a target SDK version below {@link android.os.Build.VERSION_CODES#N}, or</li>
  *     <li>explicitly opts out of the feature through
- *         {@link android.net.VpnService#METADATA_SUPPORTS_ALWAYS_ON}</li>
+ *         {@link android.net.VpnService#SERVICE_META_DATA_SUPPORTS_ALWAYS_ON}</li>
  * </ul>
  */
 public class AlwaysOnVpnUnsupportedTest extends BaseDeviceAdminTest {