Roll Media App from JQTAos4h3... to dn-tZC1K2...

Release_Notes:http://go/media_app-x20/relnotes/Nightly/media_app_202008200800_RC00.html

https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/media_app/app/+/dn-tZC1K2hB8pa-D8uCBdQh4U9xdeiQvV7QEmNoyTZQC

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/153407132,b/159083441
Tbr: media-app@grotations.appspotmail.com
Change-Id: I23699cd4b753bf3a0e8c010e6f20e4e91734c620
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367992Reviewed-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@{#800403}

DEPS

@@ -1561,7 +1561,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/media_app/app',
-        'version': 'JQTAos4h3Oa75AxNtHuNkrsTQWBJNw6CYEf6hBaQVWkC',
+        'version': 'dn-tZC1K2hB8pa-D8uCBdQh4U9xdeiQvV7QEmNoyTZQC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',