sysprops_module: do not link for android

The sysprops_module has no purpose on an android device (that has
sysprop capabilities from the os). Therefor it make no sens to have the
module in gd nor link it.

Bug: 307006275
Test: m com.android.btservices
Flag: Exempt, dead code removal
Change-Id: I6bb09bbcffc4c91bb3bafd2cf85d5789bfb52d48