Roll Fuchsia AEMU from exAX_yeKL... to dfMpR8E7I...

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: I1d63011799833cb8a46cf7cf6c8c77936a87ed3e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2490351Reviewed-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@{#819670}

DEPS

@@ -1343,7 +1343,7 @@ deps = {
       'packages': [
           {
               'package': 'fuchsia/third_party/aemu/linux-amd64',
-              'version': 'exAX_yeKLNYEK0NGmhD6PCExVZm6XY2aCPioGGLAHlYC'
+              'version': 'dfMpR8E7Ie1gS4Mf_DWloGOmZIegnZWNA0kcMr7jPlkC'
           },
       ],
       'condition': 'host_os == "linux" and checkout_fuchsia',