Android: Expose EglBase.swapBuffers with presentation time

webrtc/sdk/android/src/java/org/webrtc/EglBase14.java

Index: webrtc/sdk/android/src/java/org/webrtc/EglBase14.java
diff --git a/webrtc/sdk/android/src/java/org/webrtc/EglBase14.java b/webrtc/sdk/android/src/java/org/webrtc/EglBase14.java
index 9fcc536f580c0c1d9b2b6f7863892157959c702c..44d16d5046841ebdf993fdccad4649e3d51cff88 100644
--- a/webrtc/sdk/android/src/java/org/webrtc/EglBase14.java
+++ b/webrtc/sdk/android/src/java/org/webrtc/EglBase14.java
@@ -25,7 +25,7 @@ import android.view.Surface;
  * and an EGLSurface.
  */
 @TargetApi(18)
-class EglBase14 extends EglBase {
+class EglBase14 implements EglBase {
   private static final String TAG = "EglBase14";
   private static final int EGLExt_SDK_VERSION = android.os.Build.VERSION_CODES.JELLY_BEAN_MR2;
   private static final int CURRENT_SDK_VERSION = android.os.Build.VERSION.SDK_INT;
@@ -196,6 +196,7 @@ class EglBase14 extends EglBase {
     }
   }
 
+  @Override
   public void swapBuffers(long timeStampNs) {
     checkIsNotReleased();
     if (eglSurface == EGL14.EGL_NO_SURFACE) {