Fix HDR layer info listener to use the right area

Use the display frame instead of the buffer size as we care
about how much screen-space an HDR layer is occupying, not
how big the video buffer is.

Fixes: 193229521
Test: logs added while watching HDR videos in youtube
Change-Id: I25f9d4cfef14cb550b9db7ce57b508d2cad876b4
1 file changed