Keep experimental type for non-lineage roms

[erfanoabdi]

Me and probably others use this server for non-lineage roms but after https://github.com/julianxhokaxhiu/LineageOTA/commit/25e97721feeda59d9fa72cdf4f82f6cb31087d7b server reports "experimental" type as "snapshot" so lets just keep this type swapping only for lineage/cm

• Same thing about unofficial/nightly