Annotate fastboot tests with RequiresDevice

Emulators don't support fastboot.

Test: atest -s emulator-5554 \
      FastbootGetvarUserspaceTest FastbootVerifyUserspaceTest -- \
      --test-arg com.android.tradefed.testtype.HostTest:exclude-annotation:android.platform.test.annotations.RequiresDevice
Bug: 204499130
Change-Id: Ibd4392e50eb56b816fa1e6e781e381433798d783
diff --git a/testcases/host/fastboot_getvar/src/com/android/tests/FastbootGetvarUserspaceTest.java b/testcases/host/fastboot_getvar/src/com/android/tests/FastbootGetvarUserspaceTest.java
index d693770..7303e6c 100644
--- a/testcases/host/fastboot_getvar/src/com/android/tests/FastbootGetvarUserspaceTest.java
+++ b/testcases/host/fastboot_getvar/src/com/android/tests/FastbootGetvarUserspaceTest.java
@@ -22,6 +22,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.platform.test.annotations.RequiresDevice;
 import com.android.tradefed.device.DeviceProperties;
 import com.android.tradefed.device.ITestDevice;
 import com.android.tradefed.invoker.TestInformation;
@@ -43,6 +44,7 @@
 import org.junit.runner.RunWith;
 
 /* VTS test to verify userspace fastboot getvar information. */
+@RequiresDevice
 @RunWith(DeviceJUnit4ClassRunner.class)
 public class FastbootGetvarUserspaceTest extends BaseHostJUnit4Test {
     private static final int PLATFORM_API_LEVEL_R = 30;
diff --git a/testcases/host/fastboot_test/src/com/android/tests/FastbootVerifyUserspaceTest.java b/testcases/host/fastboot_test/src/com/android/tests/FastbootVerifyUserspaceTest.java
index 830f289..f95fc9f 100644
--- a/testcases/host/fastboot_test/src/com/android/tests/FastbootVerifyUserspaceTest.java
+++ b/testcases/host/fastboot_test/src/com/android/tests/FastbootVerifyUserspaceTest.java
@@ -16,9 +16,10 @@
 
 package com.android.tests.fastboot;
 
+import android.platform.test.annotations.RequiresDevice;
 import com.android.compatibility.common.tradefed.build.CompatibilityBuildHelper;
-import com.android.tradefed.device.ITestDevice;
 import com.android.tradefed.device.IManagedTestDevice;
+import com.android.tradefed.device.ITestDevice;
 import com.android.tradefed.device.TestDeviceState;
 import com.android.tradefed.invoker.TestInformation;
 import com.android.tradefed.log.LogUtil.CLog;
@@ -45,6 +46,7 @@
 import org.junit.runners.JUnit4;
 
 /* VTS test to verify userspace fastboot implementation. */
+@RequiresDevice
 @RunWith(DeviceJUnit4ClassRunner.class)
 public class FastbootVerifyUserspaceTest extends BaseHostJUnit4Test {
     // Default maximum command run time is set to 90 seconds.