Android EglBase: Add helper functions to query the surface size

BUG=webrtc:4742
R=glaznev@webrtc.org

Review URL: https://codereview.webrtc.org/1299543004 .

Cr-Commit-Position: refs/heads/master@{#9739}
diff --git a/talk/app/webrtc/java/android/org/webrtc/EglBase.java b/talk/app/webrtc/java/android/org/webrtc/EglBase.java
index 3e7020d..8d2c808 100644
--- a/talk/app/webrtc/java/android/org/webrtc/EglBase.java
+++ b/talk/app/webrtc/java/android/org/webrtc/EglBase.java
@@ -127,6 +127,18 @@
     return eglSurface != EGL14.EGL_NO_SURFACE;
   }
 
+  public int surfaceWidth() {
+    final int widthArray[] = new int[1];
+    EGL14.eglQuerySurface(eglDisplay, eglSurface, EGL14.EGL_WIDTH, widthArray, 0);
+    return widthArray[0];
+  }
+
+  public int surfaceHeight() {
+    final int heightArray[] = new int[1];
+    EGL14.eglQuerySurface(eglDisplay, eglSurface, EGL14.EGL_HEIGHT, heightArray, 0);
+    return heightArray[0];
+  }
+
   public void releaseSurface() {
     if (eglSurface != EGL14.EGL_NO_SURFACE) {
       EGL14.eglDestroySurface(eglDisplay, eglSurface);