I’m not all that familiar with Android (and I haven’t tested it on there yet) but Epic have this to say about mobile post-processing:
> This feature does not currently work on older Android devices which require the ‘mosaic’ mode for HDR rendering.
So if you can do HDR without mosaic mode you should be good to go. If you already own the asset and you’re keen to give it a go I’d love to hear how it went for you.