gav1: Increase max supported resolution to 4096x4096

This brings the AV1 decoder in line with other modern codecs. It
also helps the software decoder to decode most practical AVIF
images.

Bug: 141654151
Test: Media CTS tests still pass
Merged-In: Iedbd41f2336585a5d769b1d9c94e40d6e0d155ed
Change-Id: Iedbd41f2336585a5d769b1d9c94e40d6e0d155ed
(cherry picked from commit 4ad3465293ee4865231f8e078ce269e7bf393e75)
1 file changed