Do not run NetworkReservationTest in instant mode

The permissions required to run this test are not grantable to instant
apps.

Test: TH
Bug: 388929494
Change-Id: Ifd6f0b10ff2bd7036a4123aebdf9b63037c7d831
diff --git a/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt b/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt
index 0b10ef6..f05bf15 100644
--- a/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt
+++ b/tests/cts/net/src/android/net/cts/NetworkReservationTest.kt
@@ -33,6 +33,7 @@
 import android.os.Build
 import android.os.Handler
 import android.os.HandlerThread
+import android.platform.test.annotations.AppModeFull
 import androidx.test.platform.app.InstrumentationRegistry
 import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
@@ -71,6 +72,7 @@
 private const val NO_CB_TIMEOUT_MS = 200L
 
 // TODO: integrate with CSNetworkReservationTest and move to common tests.
+@AppModeFull(reason = "CHANGE_NETWORK_STATE, MANAGE_TEST_NETWORKS not grantable to instant apps")
 @ConnectivityModuleTest
 @RunWith(DevSdkIgnoreRunner::class)
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)