dPWA: Implement testing journey 7.

 * Implement new testing actions:
  - |add_policy_app_internal_tabbed|
  - |remove_policy_app|
  - |list_apps_internal|
  - |assert_app_not_in_list|
 * Reorder testing action implementations lexicographically
 * Rename ExecutePwaInstallIcon() to InstallOmniboxOrMenu()

Change-Id: I167b4b00b4028f31702813a611d5616f7bc6c040
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2598638
Commit-Queue: Jarryd Goodman <jarrydg@chromium.org>
Reviewed-by: Daniel Murphy <dmurph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842303}

chrome/test/data/web_apps/web_app_integration_browsertest_cases.csv

@@ -2,6 +2,7 @@ navigate_installable,assert_install_icon_shown, assert_launch_icon_not_shown,
 navigate_not_installable,assert_install_icon_not_shown,
 navigate_installable,assert_installable,install_omnibox_or_menu, navigate_browser_in_scope,assert_launch_icon_shown, assert_install_icon_not_shown,
 navigate_installable, install_create_shortcut_tabbed, set_open_in_window_internal, launch_internal, assert_window_created,
-navigate_installable_site_a, assert_install_icon_shown, install_omnibox_or_menu, assert_window_created, launch_internal_site_a, close_pwa, assert_no_crash,
-navigate_installable,install_omnibox_or_menu,launch_internal, uninstall_from_menu,navigate_browser_in_scope, assert_install_icon_shown,assert_launch_icon_not_shown,
+navigate_installable_site_a, assert_install_icon_shown, install_omnibox_or_menu, assert_window_created, launch_internal, close_pwa, assert_no_crash,
+add_policy_app_internal_tabbed, remove_policy_app, list_apps_internal, assert_app_not_in_list,
+Linux, Mac, Win | navigate_installable,install_omnibox_or_menu,launch_internal, uninstall_from_menu,navigate_browser_in_scope, assert_install_icon_shown,assert_launch_icon_not_shown,
 ChromeOS | navigate_installable,install_omnibox_or_menu,launch_internal, uninstall_internal,navigate_browser_in_scope, assert_install_icon_shown,assert_launch_icon_not_shown,