camera: skip RecordingTest#testRecordingFromPersistentSurface without encoders

PersistentSurface requires video encoders to be present.

Bug: 24265200
Change-Id: I65e8453c3f007dd3f49566aac4825978f275ba6a
diff --git a/libs/deviceutil/src/android/cts/util/MediaUtils.java b/libs/deviceutil/src/android/cts/util/MediaUtils.java
index 4e4a07d..b3ebbad 100755
--- a/libs/deviceutil/src/android/cts/util/MediaUtils.java
+++ b/libs/deviceutil/src/android/cts/util/MediaUtils.java
@@ -337,6 +337,27 @@
         return check(hasCodecsForPath(context, path), "no decoder found");
     }
 
+    public static boolean hasCodecForDomain(boolean encoder, String domain) {
+        for (MediaCodecInfo info : sMCL.getCodecInfos()) {
+            if (encoder != info.isEncoder()) {
+                continue;
+            }
+
+            for (String type : info.getSupportedTypes()) {
+                if (type.toLowerCase().startsWith(domain.toLowerCase() + "/")) {
+                    Log.i(TAG, "found codec " + info.getName() + " for mime " + type);
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    public static boolean checkCodecForDomain(boolean encoder, String domain) {
+        return check(hasCodecForDomain(encoder, domain),
+                "no " + domain + (encoder ? " encoder" : " decoder") + " found");
+    }
+
     private static boolean hasCodecForMime(boolean encoder, String mime) {
         for (MediaCodecInfo info : sMCL.getCodecInfos()) {
             if (encoder != info.isEncoder()) {
diff --git a/tests/tests/hardware/src/android/hardware/camera2/cts/RecordingTest.java b/tests/tests/hardware/src/android/hardware/camera2/cts/RecordingTest.java
index 52fd69f..de0e3d5 100644
--- a/tests/tests/hardware/src/android/hardware/camera2/cts/RecordingTest.java
+++ b/tests/tests/hardware/src/android/hardware/camera2/cts/RecordingTest.java
@@ -14,6 +14,7 @@
 import static android.hardware.camera2.cts.CameraTestUtils.*;
 import static com.android.ex.camera2.blocking.BlockingSessionCallback.*;
 
+import android.cts.util.MediaUtils;
 import android.graphics.ImageFormat;
 import android.hardware.camera2.CameraCharacteristics;
 import android.hardware.camera2.CameraCaptureSession;
@@ -151,6 +152,9 @@
      * </p>
      */
     public void testRecordingFromPersistentSurface() throws Exception {
+        if (!MediaUtils.checkCodecForDomain(true /* encoder */, "video")) {
+            return; // skipped
+        }
         mPersistentSurface = MediaCodec.createPersistentInputSurface();
         assertNotNull("Failed to create persistent input surface!", mPersistentSurface);