Roll Media App from wqI-j8sCb... to R77YnQ53J...

Release_Notes: http://go/media_app-x20/relnotes/Main/media_app_202101100600_RC00.html

https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/media_app/app/+/R77YnQ53JE-EhrDRTHfTXpK36kcw2lVngfX8hLaV5OQC

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: None
Tbr: media-app@grotations.appspotmail.com
Change-Id: I8dc4253e96f7459a0ef2f7c9ee5b6b7a2e66576d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2620201Reviewed-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@{#841888}

DEPS

@@ -1609,7 +1609,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/media_app/app',
-        'version': 'wqI-j8sCbfunzbh8sr3nRonzOeHLEK0lQHNePHx9xWwC',
+        'version': 'R77YnQ53JE-EhrDRTHfTXpK36kcw2lVngfX8hLaV5OQC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',