android: add HAVE_VISIBILITY to Android.common.mk

Currently only libdrm.so properly annotates its internal/private
symbols. By setting the macro every binary produced will be in the same
boat. This should give is smaller and more secure files

Cc: Chih-Wei Huang <cwhuang@android-x86.org>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>