Do not isolate sphal and vndk from unrestricted

Do not isolate sphal and vndk from unrestricted

After introducing sphal and vndk namespaces, some tests fails due to
existance of sphal namespace in unrestricted section. This change
updates sphal and vndk not to be isolated from unrestricted namespaces
so test can dlopen libraries from custom path (such as /data/local) as required.
In addition, include rs namespace in unrestricted section so
Renderscript test can use rs libraries from unrestricted section.

Bug: 156449540
Test: RenderscriptHidlTest passed with aosp_crosshatch-userdebug
Change-Id: Ib1526e225971312f126d75f26d7aa5c523011922