Revert "Roll Media App from 6AHX-97XE... to SDoonf2Hk..."

This reverts commit 98e681e4.

Reason for revert: Speculative fix for test failures in https://crbug.com/1155028

Original change's description:
> Roll Media App from 6AHX-97XE... to SDoonf2Hk...
>
> Release_Notes: http://go/media_app-x20/relnotes/Main/media_app_202012030600_RC00.html
>
> https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/media_app/app/+/SDoonf2Hkjiq08J3Ms2EUYh3QtvIsKK630F0L4wd46gC
>
> If this roll has caused a breakage, revert this CL and stop the roller
> using the controls here:
> https://skia-autoroll.corp.goog/r/media-app-chromium-autoroll
> Please CC media-app@grotations.appspotmail.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
>
> Cq-Include-Trybots: luci.chrome.try:linux-chromeos-chrome
> Bug: b/173978830,b/174603791,b/174637068
> Tbr: media-app@grotations.appspotmail.com
> Change-Id: I4b2504c38e7441bd375fc733e3f4bf8c6a9980f4
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2568299
> Reviewed-by: chromium-internal-autoroll <chromium-internal-autoroll@skia-corp.google.com.iam.gserviceaccount.com>
> Commit-Queue: chromium-internal-autoroll <chromium-internal-autoroll@skia-corp.google.com.iam.gserviceaccount.com>
> Cr-Commit-Position: refs/heads/master@{#833328}

TBR=chromium-internal-autoroll@skia-corp.google.com.iam.gserviceaccount.com,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com,media-app@grotations.appspotmail.com

Change-Id: I5ee539abef7cb8b9737f804942a393302c029f74
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: b/173978830
Bug: b/174603791
Bug: b/174637068
Cq-Include-Trybots: luci.chrome.try:linux-chromeos-chrome
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2572141Reviewed-by: Taylor Bergquist <tbergquist@chromium.org>
Commit-Queue: Taylor Bergquist <tbergquist@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833379}

DEPS

@@ -1645,7 +1645,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/media_app/app',
-        'version': 'SDoonf2Hkjiq08J3Ms2EUYh3QtvIsKK630F0L4wd46gC',
+        'version': '6AHX-97XEsRATZXtxtSFgMgB4HPdjrF2NmTP1UctxQQC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',