rendering issue for Chinese Characters with ubuntu-app-platform plugin snap

[Gary.Wang]

1.Create a calendar snap package,
2.Install the snap package and launch it.
3.Go to settings page
4.Enable "Show lunar calendar"
5.Back to main view and check the results

Actual result:
    Something wrong with all Chinese characters display.
Expected result:
    All Chinese characters can be displayed correctly.

[Gary.Wang (gary-wzl77)]

Add the expected result.

[Gary.Wang (gary-wzl77)]

I created a simple qml application to display Chinese/Japanese/Korean characters and made a snap package with ubuntu-app-platform plugin connected. I can see the same problem.

I suppose that it'd be best to fix this issue on ubuntu-app-platform so that we don't need to modify snapcraft.yaml file for each apps. Meanwhile it will not make any difference to package size as well since it will be a significant increase on package size if CJK font is snapped in each app.

Enclosed please find the screenshot.