[fuchsia] Speculative AEMU roll-back to address flakes.

Since there have been several AEMU rolls since the last version that we
think was good, doing this as a normal CL rather than a revert.

Tbr: chonggu@google.com
Bug: fuchsia:58045
Change-Id: Ib534292189155bc7bd6313c67f61c5327f44175a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346334Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796790}

DEPS

@@ -1326,7 +1326,7 @@ deps = {
       'packages': [
           {
               'package': 'fuchsia/third_party/aemu/linux-amd64',
-              'version': 'NDFbDVf-nlMof_IApfrnOXCEZ6m0bLKR9ag5pittXqwC'
+              'version': 'f3U-txC3MEm9VvlQ4pywd_v8j7679EBLg7b-jCVWqhQC'
           },
       ],
       'condition': 'host_os == "linux" and checkout_fuchsia',