You would need to find Android litecoin and ETH wallets that work with hardware wallets... or at least allow you to import "xpubs". Then you could simply import the "xpub" (master PUBLIC key) for your Ledger wallet and create a "watching only" wallet on your mobile device.
I know the (newer?) LTC version of an xpub is the "ltub"... but I can't seem to find any explorers or wallets that allow importing them
I'm not terribly familiar with ETH, I've used it about twice... so can't really comment on that one.
Maybe try asking the Electrum-LTC folks if they'll consider creating an Android version?