GitLab

The "app_name" string needs to be defined in an Android resources XML file
instead of in android_chrome_strings.grd so the string isn't copied into
every language (which makes it impossible to override the string from a
single strings.xml file)

BUG=441424

Review URL: https://codereview.chromium.org/800953002

Cr-Commit-Position: refs/heads/master@{#308189}