[Impeller] opt vulkan tests into GPU tracing. (#142649)

We're going to disable GPU tracing by default. Opt our benchmarks back in so that we have continuity.

dev/devicelab/lib/tasks/perf_tests.dart

diff --git a/dev/devicelab/lib/tasks/perf_tests.dart b/dev/devicelab/lib/tasks/perf_tests.dart
index 71462ce..b5ab1f6 100644
--- a/dev/devicelab/lib/tasks/perf_tests.dart
+++ b/dev/devicelab/lib/tasks/perf_tests.dart
@@ -816,15 +816,7 @@
   await exec('git', <String>['checkout', file.path]);
 }
 
-/// Opens the file at testDirectory + 'android/app/src/main/AndroidManifest.xml'
-/// and adds the following entry to the application.
-/// <meta-data
-///   android:name="io.flutter.embedding.android.ImpellerBackend"
-///   android:value="opengles" />
-/// <meta-data
-///   android:name="io.flutter.embedding.android.EnableOpenGLGPUTracing"
-///   android:value="true" />
-void _addOpenGLESToManifest(String testDirectory) {
+void _addMetadataToManifest(String testDirectory, List<(String, String)> keyPairs) {
   final String manifestPath = path.join(
       testDirectory, 'android', 'app', 'src', 'main', 'AndroidManifest.xml');
   final File file = File(manifestPath);
@@ -835,11 +827,6 @@
 
   final String xmlStr = file.readAsStringSync();
   final XmlDocument xmlDoc = XmlDocument.parse(xmlStr);
-  final List<(String, String)> keyPairs = <(String, String)>[
-    ('io.flutter.embedding.android.ImpellerBackend', 'opengles'),
-    ('io.flutter.embedding.android.EnableOpenGLGPUTracing', 'true')
-  ];
-
   final XmlElement applicationNode =
       xmlDoc.findAllElements('application').first;
 
@@ -860,7 +847,6 @@
           XmlAttribute(XmlName('android:value'), value)
         ],
       );
-
       applicationNode.children.add(metaData);
     }
   }
@@ -868,6 +854,33 @@
   file.writeAsStringSync(xmlDoc.toXmlString(pretty: true, indent: '    '));
 }
 
+/// Opens the file at testDirectory + 'android/app/src/main/AndroidManifest.xml'
+/// <meta-data
+///   android:name="io.flutter.embedding.android.EnableVulkanGPUTracing"
+///   android:value="true" />
+void _addVulkanGPUTracingToManifest(String testDirectory) {
+  final List<(String, String)> keyPairs = <(String, String)>[
+    ('io.flutter.embedding.android.EnableVulkanGPUTracing', 'true'),
+  ];
+  _addMetadataToManifest(testDirectory, keyPairs);
+}
+
+/// Opens the file at testDirectory + 'android/app/src/main/AndroidManifest.xml'
+/// and adds the following entry to the application.
+/// <meta-data
+///   android:name="io.flutter.embedding.android.ImpellerBackend"
+///   android:value="opengles" />
+/// <meta-data
+///   android:name="io.flutter.embedding.android.EnableOpenGLGPUTracing"
+///   android:value="true" />
+void _addOpenGLESToManifest(String testDirectory) {
+  final List<(String, String)> keyPairs = <(String, String)>[
+    ('io.flutter.embedding.android.ImpellerBackend', 'opengles'),
+    ('io.flutter.embedding.android.EnableOpenGLGPUTracing', 'true'),
+  ];
+  _addMetadataToManifest(testDirectory, keyPairs);
+}
+
 Future<void> _resetManifest(String testDirectory) async {
   final String manifestPath = path.join(
       testDirectory, 'android', 'app', 'src', 'main', 'AndroidManifest.xml');
@@ -1311,10 +1324,12 @@
       }
 
       try {
-        if (forceOpenGLES ?? false) {
-          assert(enableImpeller!);
+        if (enableImpeller ?? false) {
           changedManifest = true;
-          _addOpenGLESToManifest(testDirectory);
+          _addVulkanGPUTracingToManifest(testDirectory);
+          if (forceOpenGLES ?? false) {
+            _addOpenGLESToManifest(testDirectory);
+          }
         }
         if (disablePartialRepaint) {
           changedPlist = true;