[android] Bump gradle heap size to 4GB

Change-Id: Ic6b1ff506fc11ee077be80cf8781ad0e6c5874e9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/418136
Commit-Queue: Florin Malita <fmalita@chromium.org>
Commit-Queue: Florin Malita <fmalita@google.com>
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Reviewed-by: Jorge Betancourt <jmbetancourt@google.com>
1 file changed