add Android.mk

Change-Id: Ie9ba5a9a32eb350de5b8ad43ff694233678e7869
Signed-off-by: Roman Birg <roman@cyngn.com>
android-visualizer: remove unused files

Change-Id: Ibac67123dfb50884b72308ebcf06f2a112906015
Signed-off-by: Roman Birg <roman@cyngn.com>