android examples: change mir_demo_standalone_render_overlays to load the platform module only, and not link to libmirserver. Change should make usage of android code a bit easier to trace through during bringups. PES teams requested this change a while back, as bringing up the server is rarely a source of failure during bringups, especially during the initial get-pixels-on-screen phase, and bringing up the server introduces a lot more chatter into the traces.
Approved by Cemil Azizoglu, mir-ci-bot, Andreas Pokorny.