VideoCapturerAndroid: Report onFirstFrameAvailable() for textures as well

We currently only trigger onFirstFrameAvailable() for byte buffer frames.

R=perkj@webrtc.org

Review URL: https://codereview.webrtc.org/1701993002 .

Cr-Commit-Position: refs/heads/master@{#11670}

webrtc/api/androidtests/src/org/webrtc/VideoCapturerAndroidTest.java

@@ -152,6 +152,18 @@ public class VideoCapturerAndroidTest extends ActivityTestCase {
         capturer, cameraEvents, getInstrumentation().getContext());
   }
 
+  @MediumTest
+  public void testCameraEventsUsingTextures() throws InterruptedException {
+    EglBase eglBase = EglBase.create();
+    VideoCapturerAndroidTestFixtures.CameraEvents cameraEvents =
+        VideoCapturerAndroidTestFixtures.createCameraEvents();
+    VideoCapturerAndroid capturer =
+        VideoCapturerAndroid.create("", cameraEvents, eglBase.getEglBaseContext());
+    VideoCapturerAndroidTestFixtures.cameraEventsInvoked(
+        capturer, cameraEvents, getInstrumentation().getContext());
+    eglBase.release();
+  }
+
   @MediumTest
   // Test what happens when attempting to call e.g. switchCamera() after camera has been stopped.
   public void testCameraCallsAfterStop() throws InterruptedException {

webrtc/api/java/android/org/webrtc/VideoCapturerAndroid.java

@@ -682,6 +682,10 @@ public class VideoCapturerAndroid implements
       dropNextFrame = false;
       return;
     }
+    if (eventsHandler != null && !firstFrameReported) {
+      eventsHandler.onFirstFrameAvailable();
+      firstFrameReported = true;
+    }
 
     int rotation = getFrameOrientation();
     if (info.facing == android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT) {