Roll Fuchsia AEMU from O2VV4O63C... to L4Yg7-xN6...

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-aemu-chromium-autoroll
Please CC chonggu@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Tbr: chonggu@google.com
Change-Id: Idc3f73f7a3e0419bc26f1fe21d0abb62ccfe24e0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2445579Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#813472}

DEPS

@@ -1332,7 +1332,7 @@ deps = {
       'packages': [
           {
               'package': 'fuchsia/third_party/aemu/linux-amd64',
-              'version': 'O2VV4O63C7koze3c4VDqAsE4qqIdDBUiQCXyqLPZe7MC'
+              'version': 'L4Yg7-xN6xRY3FEAIYBqj7hMnWwvvnPYTNQr_umZm-IC'
           },
       ],
       'condition': 'host_os == "linux" and checkout_fuchsia',