Update media_app to tnUpbECn-eLbumpU1g06p173LxX2eM_OP4QF_-OtILgC CIPD package.

CIPD package: https://chrome-infra-packages.appspot.com/p/chromeos_internal/apps/media_app/app/+/tnUpbECn-eLbumpU1g06p173LxX2eM_OP4QF_-OtILgC

Release notes: http://go/media_app-x20/relnotes/Stable/media_app_20200813_RC00.html

Bug: b/163296306, b/159083441, b/159083441, b/164206096, b/157387116
Fixed: 1112044

Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Change-Id: I04dbf75b137a2ffd1ab0067a9b1d80c249e175a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2352299Reviewed-by: Patti <patricialor@chromium.org>
Commit-Queue: Trent Apted <tapted@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798024}

DEPS

@@ -1561,7 +1561,7 @@ deps = {
     'packages': [
       {
         'package': 'chromeos_internal/apps/media_app/app',
-        'version': 'C4uGPvOKetOg4cH-ijCNNQo9zb0CSgH-DLV-l8618cYC',
+        'version': 'tnUpbECn-eLbumpU1g06p173LxX2eM_OP4QF_-OtILgC',
       },
     ],
     'condition': 'checkout_chromeos and checkout_src_internal',