[Chromecast] Adds Browser test for media playback

testing/buildbot/chromium.linux.json

 {
   "Android GN": {
     "additional_compile_targets": [
       "chrome_public_apk",
       "chrome_public_test_apk",
       "content_shell_apk",
       "mandoline:all",
       "system_webview_apk"
     ],
     "gtest_tests": [
@@ skipping 175 matching lines @@
       {
         "test": "cast_base_unittests"
       },
       {
         "test": "cast_crash_unittests"
       },
       {
         "test": "cast_media_unittests"
       },
       {
+        "args": [
+          "--enable-local-file-accesses",
+          "--enable-cma-media-pipeline",
+          "--ozone-platform=cast",
+          "--no-sandbox"
+        ],
         "test": "cast_shell_browser_test"
       },
       {
         "test": "cast_shell_unittests"
       },
       {
         "args": [
           "--gtest_filter=-OutOfProcessPPAPITest.TrueTypeFont:OutOfProcessPPAPITest.BrowserFont"
         ],
         "swarming": {
@@ skipping 1178 matching lines @@
       }
     ],
     "scripts": [
       {
         "name": "nacl_integration",
         "script": "nacl_integration.py"
       }
     ]
   }
 }