Android: Add support for cropping textures

BUG=b/28622232
R=glaznev@webrtc.org, nisse@webrtc.org

Review URL: https://codereview.webrtc.org/1965953003 .

Cr-Commit-Position: refs/heads/master@{#12720}

webrtc/api/java/jni/native_handle_impl.h

@@ -38,8 +38,11 @@ class AndroidTextureBuffer : public webrtc::NativeHandleBuffer {
   ~AndroidTextureBuffer();
   rtc::scoped_refptr<VideoFrameBuffer> NativeToI420Buffer() override;
 
-  rtc::scoped_refptr<AndroidTextureBuffer> ScaleAndRotate(
-      int dst_widht,
+  // First crop, then scale to dst resolution, and then rotate.
+  rtc::scoped_refptr<AndroidTextureBuffer> CropScaleAndRotate(
+      int cropped_width,
+      int cropped_height,
+      int dst_width,
       int dst_height,
       webrtc::VideoRotation rotation);