Add module dependency checking testing method

Currently in Soong testing suite, the only method for testing module
dependency is CheckModuleDependencies(...), which comapares for the
exact module dependencies. This change adds the method
CheckModuleDependency(...) which enables checking the dependency between
two modules, instead of comparing for all dependencies of an interested
module.

Test: m nothing
Bug: 288624417
Change-Id: I804d35979ddc24b0134671e326c1d37615ec4190