LrMobile doesn't edit raw files. The workflow is camera->computer->LrMobile, not camera->LrMoble->computer, so generally you will need to import the pictures into Lr on the desktop and then sync them to the mobile device.
Is there a way to edit raw files on the tablet using any of adobe apps?
Edit raw files with Adobe apps, no. Maybe Photosmith? I believe it does it, though I've never used it.
Or you can shoot raw+JPEG, import the JPEGs into LrM and later in LrDesktop use a plugin like my Syncomatic to copy the adjustments from JPEGs to raws.