Remove framework_res_package_export_deps

framework_res_package_export is now always either the prebuilt
android.jar from an SDK or a package-export.apk generated by
Soong, so the dependency on R.stamp is never useful.  Remove
all assignments to framework_res_package_export_deps, and replace
usages with frameworks_res_package_export.

Test: m checkbuild
Change-Id: If484e9eb08061cb0ed0697755f13db71d741aaab