Update media_app to C4uGPvOKetOg4cH-ijCNNQo9zb0CSgH-DLV-l8618cYC CIPD package.

CIPD package: https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/media_app/app/+/C4uGPvOKetOg4cH-ijCNNQo9zb0CSgH-DLV-l8618cYC

Release notes: http://go/media_app-x20/relnotes/Stable/media_app_20200811_RC00.html

Bug: b/162102940, b/153113592, b/159083441, b/160021753, b/153274181
Fixed: 1112044

Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Change-Id: I0a07263ed0ecc606f0b096dde7a9e3409b136856
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2351260Reviewed-by: Trent Apted <tapted@chromium.org>
Commit-Queue: Mitchell McDermott <mcdermottm@google.com>
Cr-Commit-Position: refs/heads/master@{#797519}

DEPS

@@ -1561,7 +1561,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/media_app/app',
-        'version': 'UZ0LaGP4pONeWSmuhGzTHaNGXAnBjLFccXtfgum0L4QC',
+        'version': 'C4uGPvOKetOg4cH-ijCNNQo9zb0CSgH-DLV-l8618cYC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',