Use Module.GetProperties() instead of ModuleBase.generalProperties

ModuleBase.generalProperties served the pupose of being a subset
of ModuleBase.customizableProperties. But now with the removal of
the latter, the former is simply a redirection to Module.GetProperties()

Bug: 206961391
Test: m nothing and diff the ninja files
Change-Id: I6dd8b7ba74eb5e7ffb61029b0f9129eec2ccfdaf

android/prebuilt.go

@@ -183,7 +183,6 @@ type PrebuiltSrcsSupplier func(ctx BaseModuleContext, prebuilt Module) []string
 func initPrebuiltModuleCommon(module PrebuiltInterface) *Prebuilt {
 	p := module.Prebuilt()
 	module.AddProperties(&p.properties)
-	module.base().generalProperties = module.GetProperties()
 	return p
 }