Only themes that specify a theme image via `theme_frame` are supported, themes that use e.g. `additional_backgrounds` (Purple Earth, Nightly Lights) or no theme image at all (Calm Pastel - technically it has an image because I think it was previously required, but it's completely transparent) aren't supported on Android.
Bug 1548776 Comment 29 Edit History
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Only themes that specify a theme image via `theme_frame` are supported, themes that use e.g. `additional_backgrounds` (Purple Earth, Nightly Lights) or no theme image at all (Calm Pastel - technically it has an image because I think it was previously required even for desktop, but in any case it's completely transparent) aren't supported on Android.